Operation and maintenance
[化] 使用和维护
🧩 词语组成解析
and
[ənd, ən,ænd]
conj. 和，与;而且;于是，然后;因此;
🗣️ 情景例句
I've seen pictures of him.
我见过他的照片。
I'd say the expected delivery date should be by the end of the month.
我得说预定发货日期应该在本月底。
and that their rims are clean and dry.
瓶口清洁干燥。