Migration theory
[医] 移行学说(交感性眼炎)
🧩 词语组成解析
migration
[mai'ɡreiʃən]
n. 迁移，移居;
🗣️ 情景例句
We can write letters. It's cheaper than calling.
我们可以写信就好，那比打电话便宜。
When I had a rest, what were you doing?
当我休息时，你在做什么？
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。