Sasd
结构化分析和结构化设计
🗣️ 情景例句
Let's get Marilyn.
还是叫Marilyn来吧。
He who makes no mistakes, makes nothing.
不犯错误，成不了事。
Once we get down to the oil, it usually flows to the surface because great pressure,
一旦到达油层，石油就会由于地下巨大的压力流到地面上来，