Diffusant
扩散剂
🗣️ 情景例句
If it's possible, I'd like to arrange a time to come up and see you.
可以的话，我希望能安排时间来看你。
After black clouds, clear weather.
否极泰来。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。