求英语牛逼的大大帮忙总结（缩写）下这2个短文哈!要用英语的~急要!read the following passages and summarise each one of them!PASSAGE1In chemical cells,electricity is produced by chemical reactions between the components.These

求英语牛逼的大大帮忙总结（缩写）下这2个短文哈!要用英语的~急要!read the following passages and summarise each one of them!PASSAGE1In chemical cells,electricity is produced by chemical reactions between the components.These
求英语牛逼的大大帮忙总结（缩写）下这2个短文哈!要用英语的~急要!
read the following passages and summarise each one of them!
PASSAGE1
In chemical cells,electricity is produced by chemical reactions between the components.These cells consist of two different conductors called electrodes that are located in a fluid conductor called an electrolyte,containing ions.Cells have emfs that are characteristics of the materials that are used.There are two classes of chemical cells.
If the switch is opened,the current in coil 1 decreases rapidly to zero,and a transient current is induced in coil 2 ,which tries to maintain the magnetic field.A current is induced in the secondary coil only when the current in the primary is changing,or when the two coils are moved relative to each other.This is called mutual induction .Faraday determined that the magnitude of the induced emf depends on the number of turns in the coils and the time rate of change of the magnetic field.Self-induction
While a changing electric current induces emfs in neighboring circuits,it also induces an emf in its own circuit .As the current varies in a single isolated circuit,its magnetic field changes,and there is a corresponding change in the magnetic field surrounding that circuit.This changing magnetic field induces an emf that opposes the original change of the current in the same circuit.This is called self-induction.The self-induced emf is known as the counter or back emf.The self-induction unit for inductance is called the henry (H).In a circuit that has a self-inductance of 1 H,a time rate of change of current equal to 1 A/s induces a counter emf of 1 V.
PASSAGE 2
One of the most important and interesting characteristics of Pascal is its ability to support many different types of data.These include simple data types,string data types,structured data types and pointer data types.
Simple type data are single items (numbers,characters,and so on) that are associated with single identities on a one-to-one basis.Actually,there are several simple data types.These include the four standard data types--integer,real,char and Boolean--and the user-defined simple types,which include subrange types and enumerated types.
String-type data represent strings of characters.Each single string type data item will represent one entire string.This data type is not found in all versions of Pascal,though it is included in Turbo Pascal.
Structured type data consists of multiple data items that are related to one another in some specified manner.Each group of data items is associated with a particular identifier.The individual data items within each group can also be associated with corresponding individual identifiers.There are four types of structured data in Pascal arrays,records,sets and files.
Pointer type data are used to construct dynamic structured data types.Description of their characteristics and use is beyond the scope of the present discussion.

求英语牛逼的大大帮忙总结（缩写）下这2个短文哈!要用英语的~急要!read the following passages and summarise each one of them!PASSAGE1In chemical cells,electricity is produced by chemical reactions between the components.These
PASSAGE1
In chemical cells, electricity is produced by chemical reactions between the components. These cells consist of two different conductors called electrodes that are located in a fluid conductor called an electrolyte, containing ions. Cells have emfs that are characteristics of the materials that are used. There are two classes of chemical cells.
If the switch is opened, the current in coil 1 decreases rapidly to zero, and a transient current is induced in coil 2 , which tries to maintain the magnetic field. A current is induced in the secondary coil only when the current in the primary is changing, or when the two coils are moved relative to each other. This is called mutual induction . Faraday determined that the magnitude of the induced emf depends on the number of turns in the coils and the time rate of change of the magnetic field. Self-induction
While a changing electric current induces emfs in neighboring circuits, it also induces an emf in its own circuit . As the current varies in a single isolated circuit, its magnetic field changes, and there is a corresponding change in the magnetic field surrounding that circuit. This changing magnetic field induces an emf that opposes the original change of the current in the same circuit. This is called self-induction. The self-induced emf is known as the counter or back emf. The self-induction unit for inductance is called the henry (H). In a circuit that has a self-inductance of 1 H, a time rate of change of current equal to 1 A/s induces a counter emf of 1 V.
PASSAGE 2
One of the most important and interesting characteristics of Pascal is its ability to support many different types of data. These include simple data types, string data types, structured data types and pointer data types.
Simple type data are single items (numbers, characters, and so on) that are associated with single identities on a one-to-one basis. Actually, there are several simple data types. These include the four standard data types--integer, real, char and Boolean--and the user-defined simple types, which include subrange types and enumerated types.
String-type data represent strings of characters. Each single string type data item will represent one entire string. This data type is not found in all versions of Pascal, though it is included in Turbo Pascal.
Structured type data consists of multiple data items that are related to one another in some specified manner. Each group of data items is associated with a particular identifier. The individual data items within each group can also be associated with corresponding individual identifiers. There are four types of structured data in Pascal arrays, records, sets and files.
Pointer type data are used to construct dynamic structured data types. Description of their characteristics and use is beyond the scope of the present discussion