Ppm.
[医] 兆比率(百万分之几)
🗣️ 情景例句
Hello.
哈喽。
Gain got by a lie will burn one's fingers.
靠欺骗得来的利益会使自己受害。
Chickens slaughtered in the United States, claim officials in Brussels, are not fit to grace European tables.
布鲁塞尔的官员说，在美国屠宰的鸡不适于用来装点欧洲的餐桌。