Ed50
[医] 半数有效量
🗣️ 情景例句
I hear what you're saying.
我明白你的意思。
She felt very awkward about the unpleasant situation.
她因不愉快的场面而感到十分困窘。
Accurate, don't you think? Fortunately, I wasn't wearing it at the time.
真够准的，是不是？幸亏我当时没戴帽子。