Tec
n. 侦探
🗣️ 情景例句
Here's a real buy.
这个价格便宜。
How much is a round-trip ticket to Beijing?
一张到北京的来回票要多少钱？
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。