原著：[美] 查尔斯 科温 石淑芳等 编 （以后就不多说了）
1. act like a pro 做事很内行
Example:
He is just a high school student but on the baseball diamond acts like a pro.
尽管才是各种学生， 他在棒球场上却打得颇内行。
2. bite off more than one can chew 贪多嚼不烂， 承担力所不能及的事情
Example:
When I took on both responsibilities at the same time, I bit off more than i
could chew.
3. can-do person 能人 牛人（牛人是我加上的 :P ）
Example:
We knew Jim would organize a relief mission for the flood victims; he's a
can-do person
