n. 抵押品, 挑战\\nvt. 以...为担保, 以...为赌注\\nn. 抵押品, 标准度量, 计量器\\nvt. 精确计量, 估计
🗣️ 情景例句
I miss them.
我想念他们.
His necktie is behind the book case.
他的领带在书架后面。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.