重点讲解：
1. think of 想起；想到；
例句：Every once in a trance when will recall the circumstances of the past, seems to think of the joy of sadness.
每一次发呆的时候，都会想起昔日的情节，想到欢乐中隐隐的哀伤&fjG*Pds;^im!)gMirZ。
2. go down （价格、水平或数量）下降，下跌；
例句：Average life expectancy went down from about 70 to 67.
平均预期寿命从70岁左右降到了67岁w,!2nwM[kh~7x.Ml。
3. all the time 一直；始终；
例句：Then the scales fell from my eyes: he had been lying all the time.
我恍然大悟: 他一直在撒谎~OLL&(sW5=-vVK@T。
4. even though 即使；尽管；纵然；
例句：Even though I take medicine, I feel worse than I do yesterday.
虽然吃了药，却好像比昨天更严重#|Yw*,ON53NRn。