Echelogram
阶梯光谱照片
🗣️ 情景例句
Good morning, Mr. Zhou. Take a seat, please. What can I do for you?
早上好，周先生。请坐。有什么事吗？
Learn young,learn fair.
为学趁年青，既学须学好。
Money is no more than our servant.
金钱不过是我们的仆人。