Biotest
生物监测
🗣️ 情景例句
And we brought some home for you.
而且带了一些回来给你 。
When one is about to act, one must reason first.
凡事要先思而后行。
It took years of hard work to speak good English.
讲一口流利的英语需要多年的刻苦操练。