Maintenance of system software
[计] 系统软件维护
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
and check on your mother and the baby.
问问你母亲和孩子的情况 。
Don't be ashamed.
不要害羞。
He can't write very much on a card, Mum.
在明信片上他写不了很多，妈妈。