Ed50
[医] 半数有效量
🗣️ 情景例句
that you care about me, and
关心我而且，
I am 60 years old and siingle.
我六十岁了，仍然单身。
and reduces correspondingly the amount of economic resources that could be used for developing the country.
从而相应地减少了那部分可以用来发展国家的经济资源。