Septavalent
a. [化]七价的
🗣️ 情景例句
Now maybe...
也许现在……
I remember the girl whose father owns a pet shop.
我记得那个女孩的父亲有一家宠物店。
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。