过一段时间之后，如果新换上的金丝雀安然无恙，矿工们又可以安全地重返矿井。

After waiting a while, and with a fresh canary, the miners could safely reenter the mine.

youdao

过一段时间之后，如果新换上的金丝雀安然无恙，矿工们又可以安全地重返矿井。

After waiting a while, and with a fresh canary, the miners could safely reenter the mine.

youdao