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
It won't take me long at all.
不需要花很长时间的。
It is desirable to apply to good schools.
申请好学校是令人向往的。
but then she decided that at her age it might be more prudent to have someone with her,
但转念一想，像她这个年纪，最好找个人一起去。