Polya's operation
[医] 波耳亚氏手术(部分胃切除及结肠后胃空肠吻合术)
🧩 词语组成解析
🗣️ 情景例句
I like it,
我觉得不错。
My coat is yellow.
我的外套是黄色的。
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。