Perfective maintenance
[计] 完善性维护
🧩 词语组成解析
a. 完成的, 完成时的\\nn. 完成时
🗣️ 情景例句
What, Harry?
什么 ，Harry？
Bread is the staff of life.
民以食为天。
I'm certain he'll go to see the film, because he's bought a ticket.
我肯定他会去看电影的，冈为他把票都买好了。