Pointer subtraction
[计] 指示字减法
🧩 词语组成解析
pointer
['pɔintə]
n. 建议;线索;教鞭;（测量仪器上的）指针;
🗣️ 情景例句
The Post Office aims to improve its quality of service.
邮局锐意改善服务质量。
If he doesn't play, who will?
如果他不，谁要去玩？
Wake me up at five thirty.
请在五点半叫醒我。