Concentration gradiant
[电] 浓度梯度
🧩 词语组成解析
🗣️ 情景例句
Good-bye.
再见。
If he wants to make any changes,minor alternations can be made then.
如果他有什么意见的话，我们还可以对计划稍加修改。
The city was equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.
城里甚至还敷设了排水系统，因为在狭窄的街道底下发现了许许多多陶土制作的排水管道。