Pitfalls
n. （捕猎野兽用的）陷阱( pitfall的复数形式 ); 意想不到的困难, 易犯的错误
🗣️ 情景例句
I was teaching music,
我当时教音乐，
You must go to the moon. It's your duty.
你必须上月球去，这是你的职责。
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。