Indefinite summation
[计] 不定和
🧩 词语组成解析
🗣️ 情景例句
I see him on the train every day but we are not on speaking terms.
我每天都在火车上见到他，但彼此没有说过话。
How much do you charge per unit?
你们每件要价多少呢？
'I don't think the windows need cleaning at this time of the night.
“我看不必在夜里这个时候擦窗子吧。