Deckplatte
[医] 顶板
🗣️ 情景例句
Very nice to meet you.
很乐意见到你。
Yeah, so that I can repair it, OK?
对啦,那样我就能替你缝补了，知道不？
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。