保质期；此日期前最佳

食品包装上标明的日期

best before dates───保质期；此日期前最佳

best-before date───保质期；此日期前最佳

best-before dates───保质期；此日期前最佳

not before time───不是在时间之前

before dark───黄昏以前

best defence───最佳防守

best effort───尽力而为，尽最大努力；尽力服务

best performance───最佳性能；最佳表演

to foredate───提前

The bread will soon be past its best before date.───这面包快过保质期了.

For best results, make sure you use your sunscreen before its expiration date, and store it in a cool place.───为达到最佳效果，请确保您在截至日期前使用您的防晒品，并将其存放在阴凉的地方。

Teams lack an up-to-date knowledge base for educating themselves on methods and best practices: Before effectively performing development processes, teams need to trained.───团队缺乏在方法和最佳实践上进行自我培训的最新的知识基础：在有效地进行开发过程之前，团队需要进行训练。

If you’ve never tried surfing before, it might not the best idea to try it on a first date.───如果你从来没有滑过旱冰，那么初次约会去滑旱冰一定不是一个好想法。