Waterfall model
[计] 瀑布模型
🧩 词语组成解析
🗣️ 情景例句
we would like to have our investments returned as early and safely as possible.
我们总想尽早而又安全地收回我们的投资。
He was out of his mind with grief.
他伤心得精神错乱了。
He put them both into his mouth.
他把这两枚硬币全都放进嘴里。