Acid catalyst
[机] 酸催化剂
🧩 词语组成解析
🗣️ 情景例句
It just takes time to feel comfortable in a new place.
总是需要一段时间才能适应一个新的环境。
We are sure the contract can be carried out smoothly.
我们确信合同会顺利执行的。
It was his job to repair bicycles and at that time he used to work fourteen hours a day.
他那时的工作是修理自行车，并且通常是一天工作14个小时。