重点讲解：
1. for example 例如；比如；
例句：For example, dogs may be able to hear the microfacturing of rocks a few milliseconds before a quake shock reaches the surface.
比如说，狗也许能在地震到达地表几毫秒之前听见石头间的微小动静J%J%7a5)Xyydi。
2. even if 即使；尽管；纵然；
例句：Food seems to have been available, even if the quality left much to be desired.
食品似乎能够买到了，虽然质量还远不尽如人意,^C(VRBik2tor6GtJnc_。
3. in the middle of 中部；中央；中间；
例句：I was in the middle of the back row.
我在后排的中间xN.cw~3QETfbn*。
4. of course 当然，自然；
例句：Some people, of course, denied the validity of any such claim.
当然，一些人否定了此类说法的合理性wOo@so-=FAb=)Jo。