Valleyfield
n. (Valleyfield)人名；(英)瓦利菲尔德
🗣️ 情景例句
What's that, Mr. Carlson?
什么事， Carlson先生？
Silence is more eloquent than words.
沈默是更有说服力的言词。
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。