资源介绍：较为详细，适合新授课使用。

1. add  vt. 加，增加，添加；进而说或写；补充说道
（1） add up 合计，加起来，把……加起来eg. Please add up these numbers.
（2） add up to 总计达（后面多指合计起来的数目，不用被动）                   eg. His whole school education added up to no more than one year.
（3） add to 添加，增添 eg. The bad weather added to our difficulty.
 Every failure one meets with adds to one’s experience. 吃一堑，长一智。
（4） add…to… 把……加到……上 eg. Please add some salt to the water.
2. upset  (1)adj. 心烦意乱的，不安的；不适的
     eg. He looked upset when he found his money lost.
  be upset about/at sth 对……感到不安 eg. He was very upset about the ending.
          (2)vt. 使不安，使心烦 使生气( upset, upset; upsetting)