什么是real condition和unreal condition?

什么是real condition和unreal condition? condition和situation区别? 什么是real time PCRRT 什么是real play condition和situation的区别 如何区别condition 和situation? condition和situation的区别 condition和environment的区别 in good condition和in a good condition的区别 in bad condition和in a bad condition 的区别 in good condition和in condition有区别吗, in a condition和 on a condition的区别 in good condition 和 in condition 有区别吗 谁知道什么是real brazilian hair? 什么是NEGATIVE INTEGER,NATURAL NUMBER,REAL NUMBER加上解释和例子 occasion和situation和condition怎么区别? 真实条件句和非真实条件句的一个问题!我已经糊了!这里有俩句子,第一个是unreal condition,第二个是real condition.但是我理解不了..1.If you lived in Iraq,you would be in danger.(unreal)2.If he lived in Spain,then he real和over