Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
You couldn't pick a finer medical school than Michigan.
你再也找不到一所比Michigan大学更好的医学院了?
I must be the first.
我一定要得第一。
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。