我站在更衣室外等候基思完成出发前的准备。

I stood outside the locker room waiting for Keith to finish getting ready.

youdao

出发前，他把要留下的所有东西列了一份详细清单。

Before starting, he made an inventory of everything that was to stay.

《柯林斯英汉双解大词典》

出发前要仔细设计你的路线。

Plan out your route before you go.

《牛津词典》