Ed50
[医] 半数有效量
🗣️ 情景例句
And we're bringing the ketchup, mustard, relish--all that stuff.
我们还要带蕃茄酱， 芥末， 调味酱 ，诸如此类的东西。
I can't believe it.
我简直不敢相信。
the total absence of fishing boats around the oil rigs.
钻井平台周围根本没有捕鱼船只。