Shm
[化] 简谐运动
🗣️ 情景例句
He was very helpful to me, remember?
他帮过我大忙， 记得吗？
The problem is far from easy.
这问题绝非易事。
In the centre of the hall, there were a number of tall structures which contained coloured lights.
展厅中央是装有彩色灯泡的许多高高的构件，