1.sign up 簽約
例句:He signed up as a flight attendant with Korean Air.
他與大韓航空公司簽了約,當機乘員 。
2.brood about 沉思
例句:As historians we brood about the study of the history.
作為歷史學家,我們關心的是研究歷史 。
3.as well as 不但…而且
例句:She can play tennis as well as basketball.
她也會打籃球,也會打網球 。
4.be used to 習慣于
例句:This piece of cloth can be used to make a pair of pillow cases.
這塊布可以做一對枕套 。