2022年2月8日
balance
摘要： A scale or balance is a device to measure weight or mass. These are also known as mass scales, weight scales, mass balances, weight balances. 天平是用来测量重 阅读全文
posted @ 2022-02-08 22:20 华容道专家 阅读(222) 评论(0) 推荐(0)