efore
美
英 
例句
Be sure to avoid stressing it in any way for several days efore introducing any recovery exercises at all.
在开始康复练习之前,务必要休息数日并避免该部位的再次受到任何压力。
Create a trial version of the iPhone app that you developed to test the waters b efore launching the product full-blast.
在全面发行之前,先做一个测试版进行试水。