Ed50
[医] 半数有效量
🗣️ 情景例句
Things have been better, but I'm still happy to be living here.
情况好了不少，但我还是很乐意住在这儿。
Name your own price.
你自己说个价钱吧。
My old friend, Harrison, had lived in the Mediterranean for many years before he returned to England.
我的老朋友哈里森在回到英国以前曾多年居住在地中海地区。