例句:A registered dietitian can help you design a meal plan.
注册营养师可帮助你制订饮食计划。 

2.By the time 等到...时候

例句:By the time ambulancemen arrived he was unconscious.
救护人员到达时他已经不省人事了。

3.on sale 特价

例句:The new commemorative stamps will be put on sale next week.
新的纪念邮票将于下星期发售。

4.in one fell swoop 一下子

例句:In one fell swoop the bank wiped away the tentative benefits of this policy.
银行一下子就抹杀了这项政策暂时带来的好处。