Ppb
[化] 十亿分率
🗣️ 情景例句
I hope you won't take offense, But will accept what I say here as some fatherly advice.
我希望你不要反感，能够接受我这父亲般的建议。
Then this evening I went jogging with my wife.
接着今天晚上我和妻子一起去慢跑。
Take a hike!
哪儿凉快哪儿歇着去吧。