烟雾警报器装了没有电的电池或是没有装电池，就如同没有装置烟雾警报器。

A smoke alarm with a dead or missing battery is the same as having no smoke alarm at all.

youdao

烟雾警报器装了没有电的电池或是没有装电池，就如同没有装置烟雾警报器。

A smoke alarm with a dead or missing battery is the same as having no smoke alarm at all.

youdao