Lif
[化] 激光诱导荧光
🗣️ 情景例句
It's five years ago.
那是五年前了。
I hesitate to ask you, but will you lend me some money?
也许我不该问你，你能借我一些钱吗？
below 20 per cent, its bactericidal action is negligible.
浓度低于20％时，杀菌能力基本上就不存在了。