Refractory anemia
难治性贫血，顽固性贫血
🧩 词语组成解析
🗣️ 情景例句
I've mailed off several applications for jobs that interest me.
我已经寄出了几份求职材料，应聘我感兴趣的职位。
A standard one. Replacement during the first year if all rules for proper use have been followed.
有一个原则，如果在一年内符合各种使用规定，就可更换。
that is something like 6,000,000 spiders of different kinds on a football pitch.
这就是说，在一个足球场上约有600万只不同种类的蜘蛛。