The slides at main door can be used as flotation aid.

主出口的滑梯可用作辅助漂浮装置。

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Behind her was an elderly lady sitting outside the main door of the house.

而她身后的堂屋门前，坐着一位老太太。

youdao

Behind her was an elderly lady sitting outside the main door of the house.

而她身后的堂屋门前，坐着一位老太太。

youdao