1.up to 由…决定的
例句:It is up to him to clean our classroom today.
今天应由他做教室清洁 。
2.step up 提高
例句:He urged donors to step up their efforts to send aid to Somalia.
他敦促捐赠者再接再厉,将救援物资送往索马里 。
3.non-stop 不停的
例句:The training was non-stop and continued for three days.
培训不间断地连续进行了3天
4.as well as 不但…而且
例句:She can play tennis as well as basketball.
她也会打篮球,也会打网球 。