评论
打印
重点讲解：
1. exert on 施加（影响、压力等）；行使，运用（权威等）；
The moon exerts a force on the earth that causes the tides.
月球对地球的吸引力引起潮汐。
2. topple over (使)摇摇欲坠；(使)不稳而倒下；
The tree is so badly damaged they are worried it might topple over.
这棵树严重受损，他们担心它会倒掉。
3. stare at 盯着看；凝视；注视；
I would rather stare at a clear, star-filled sky than a TV set.
我宁可凝视繁星满天的晴朗夜空也不愿盯着电视机。
4. fess up 供认；坦白；
He fessed up to the fact that he was too old.
他承认这一事实：他年龄太大了。
adj. 看不见的，无形的
n. 隐形人(或物
