She slipped in and out of the theatre by a side door.

她从侧门溜进去又溜出了那家剧院。

Someone came up, opened the passenger side door which would scare you.

有人走过来，打开了乘客侧门，这可能会吓到你。

He left the hotel by a side door.

他从这家旅馆的一个旁门走了出去。

There is a side door here.

这儿有一个侧门。

This time, a side door was unlocked.

这一次，一道侧门没有上锁。