Concretor
混凝土工
🗣️ 情景例句
May I have a bus map, please?
请给我一份公共汽车路线图好吗？
Continual failure drove him to suicide.
不断的失败逼得他自杀。
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。