Cdfi
[医]Color Doppler Flow Imaging
🗣️ 情景例句
What's the third thing?
第三件事情是什么？
Certainly not.
一定不是。
From 1830 onwards in the USA and from about 1870 in Canada, settlers began to move westwards and to take possession of the plains as their own.
美国自1830年起，加拿大从1870年左右起，殖民者开始向西迁移，并把平原据为己有。