重点讲解：
1. figure out 想出；理解；弄清；
例句：I can not figure out why they ridicule this constructive suggestion.
我弄不懂他们为什麽嘲笑这一建设性建议U@biO&Rz*plC=*。
2. turn out 原来是；结果发现；
例句：Julie has turned out to be the best student in our class.
结果证明朱莉是我们班上最棒的学生OeXWsVp#)5(57EyHXE~!。
3. be sure of 一定的；必定的；无疑的；确保的；
例句：He was sure of Jack's innocence.
他确信杰克是无辜的%-rjPsC,,ax。
4. pay attention to 关心；注意；
例句：Everyone should pay attention to preserving his own eyesight.
每人都应注意保护视力hN2ftxsyzH,EJz。