Stair-step costs
[经] 梯级式成本, 阶梯成本
🧩 词语组成解析
stair
[stɛə]
n. 楼梯;（楼梯的）一级;
step
[stɛp]
n. 步，脚步;步骤，手段;步调;级别;
vt.& vi. 举步，行走;踩，踏上;跨入;轻快地走;
vi. 踏，踩;走;
vt. 跳舞;迈步;使成阶梯状;
n. 费用；诉讼费；损失（cost的复数）
🗣️ 情景例句
Please sit down.
请坐下。
I don't think so. I know several convenient hotels. Let me make some calls.
我认为没有，我知道有几家便利旅馆，让我打几个电话。
Most business letters around the world are written in English.
世界上大多数商务信函都是用英语写的。