Ppb
[化] 十亿分率
🗣️ 情景例句
My brother is a junk food addict.
我兄弟就爱吃垃圾食品。
Beat about the bush.
拐弯抹角。
Like his father, he was driving a car called Bluebird.
同他父亲一样，他也驾驶着一辆名叫“蓝鸟”的汽车。