Bromonaphthalene
溴(代)萘
🗣️ 情景例句
I don't understand.
我不懂你在讲什么。
Failure is the mother of success.
失败是成功之母。
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。