Hello,I am an American,I want to ask a question,what is "给力"?

Hello,I am an American,I want to ask a question,what is 给力? Hello everyone.My name is .I am a student of Grade eight .I am an outgoing ,lovely girl and Hello ,Bill?NO,____.A.I am Sam B.I an mot bill C.This is Sam speaking I am only want say hello to hello,I am Mary的同义句 Hello.I am coming翻译成中文 hello alex,I am from M16 hello alex, I am from M16. I am an elephant hello i am feom canada i love reading 歌词是hello,I am calvin ,hello ,I am calear.What's your name?What's your name?I am calear.hello,he Hello everyone.My name is .I am a student of Grade eight .I am an outgoing ,lovely girl andHello everyone.My name is ....I am a student of Grade eight .I am an outgoing ,lovely girl and I am so welcomed by my friends and my classmates.I have a best f Hello,什么 a new student here?什么,I am Hello,I am Joyce,Very nice for you. jack:Hello jiessie where___?jessie:I am from_____. Hello,I am Tony!（ ）you Li Xing I English am an boy I am an old dog