Zigggggggg829 | 1 points | May 28 2021 15:46:53

学好微积分，出门买菜省大钱

[-] Outside-Conflict-665 | 8 points | May 28 2021 16:50:02

积分还成，微分应用在买菜上怕是买回来只能喂鸡了。

[-] SmallPotatoSimon | 2 points | May 28 2021 18:14:58

要學好dx dy 計算自己的曲線收益

[-] DogRarelySee | 1 points | May 28 2021 16:04:26

拼团买菜是吧