beforehand
例子
Guests must submit dietary requests beforehand.
客人必须提前提交饮食要求。
The speaker emailed her notes beforehand.
演讲者提前通过电子邮件发送了她的笔记。
例子
She packed extra batteries beforehand, expecting a blackout.
她事先打包了额外的电池，预计会停电。
They trained staff beforehand to handle emergencies.
他们事先培训了员工以应对紧急情况。
