Propria
固有層
??? 情景例句
On a contract.
在一份合同上面。
I'll let you know if anything comes up.
如果發(fā)生了什么事，我會(huì)讓你知道。
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一個(gè)氣墊來支撐船體，低壓空或軟墊，軟墊周圍用高壓空氣環(huán)繞。