1.interest in 对...有兴趣

例句:He doesn't manifest much interest in his studies.
他对学习没表示出多大兴趣。

2.so far 目前

例句:So far the message has not been read.
这个信息至今未被辨认出来。

3.suffered from 承受；遭受

例句:The operation was successfully performed, but the patient suffered from shock.
手术进行良好，但病人发生了休克现象。

4.back off 后退，卸下

例句:Soldiers are not allowed to back off without order while being in the battlefield
士兵在战场上没有命令是不准后退的。