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 called channel five.
我打电话给了第五频道。
In prosperity think of adversity.
居安思危。
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.