Conservation equation
[计] 守恒方程
🧩 词语组成解析
🗣️ 情景例句
Licking envelopes.
粘信封。
He is eating a little.
他只吃了一点儿。
Then, instead of having someone answering the phone all day, people can ring up the railway station and listen to a tape recording of the information.
然后，人们可以打电话到火车站，从录音电话中获取信息，而不要安排一个专人整天接电话。