Important sentences for recitation.
1. Many people enjoy playing different sports while others just watching them.(P22)
一些人喜欢做不同的运动而另外一些人只喜欢看别人运动。
While conj. 1). On the other hand (implying a contrast) 而（表对比）
Motion is absolute while stagnation (静止) is relative._________________________
2). During a period of time that 当的时候，在时，和同时。
Strike while the iron is hot.________________________
I read while cooking, while eating, and while exercising (if at all possible).
