1.unsure (adj.)不确定的;缺乏信心的,无把握的;不稳定的
We were all unsure about when she left Taipei.
我们都不太清楚她什么时候离开台北。
2.watch (v.)观看;监视;看守;注意
Yesterday I was watching a movie.
我昨天在看电影。
3.happened (v.)出现;碰巧;发生(happen的过去式和过去分词)
This is probably something that never happened.
这应该是从未发生过的事情。
4.thing (n.)事件;形势;东西;事物;家伙;事业
I don't want this to become a thing between us.
我不想让这成为一件不愉快的事情。