它是一条线，它们完全相同，这是我的紧急备用绳。

It's a string, and they're identical, and this is my emergency safety rope.

youdao

在一些情况下还可充当紧急事故备用。

It can be the standby install capacity of the whole system for emergency case.

youdao

在一些情况下还可充当紧急事故备用。

It can be the standby install capacity of the whole system for emergency case.

youdao