Pmts
[化] 磺胺汞
🗣️ 情景例句
That isn't necessary.
这倒不必。
In the world, who knows not to swim goes to the bottom.
处世似游泳，不会即下沉。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些计划去偏远地区旅行，或在饮用水不现成的国家居住的人，应该知道如何使水适于饮用的各种办法。