Sga
abbr. substantial gainful activity 执著的惟利是图的行为
🗣️ 情景例句
I know who you are!
我知道你是谁！
I hope you can find your book soon.
我希望你很快就找到你的书。
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。