Outcrossing
n. 异型杂交, 外交
🗣️ 情景例句
We communicate with each other by letter.
我们用书信彼此联系。
Would he have seen you if you hadn't waved to him?
如果你没向他招手他会看见你吗？
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.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。