狗嗅这些管，然后坐在那些他们检测到肺癌气味的人面前。

The dogs sniffed the tubes and sat down in front of those in which they detected lung cancer smells.

youdao

狗嗅这些管，然后坐在那些他们检测到肺癌气味的人面前。

The dogs sniffed the tubes and sat down in front of those in which they detected lung cancer smells.

youdao