Back migration
[化] 反迁移
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
migration
[mai'ɡreiʃən]
n. 迁移，移居;
🗣️ 情景例句
He's had so many colds and sore throats recently.
他最近常常感冒喉咙痛。
Do you have the tickets, or not?
你到底有没有买票？
let alone distances of tens or hundreds of light years.
更不用说几十光年或几百光年远的地方了。