Unia
abbr. Universal Negro Improvement Association 全体黑人进步协会
🗣️ 情景例句
Why are you back so early?
你们怎么这么早回来？
Will you do me a favor?
你帮我一个忙好吗？
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。