Msis
[计]= MultiState Information System,多状态信息系统
🗣️ 情景例句
so it's my pleasure
所以现在我很乐意
Which is your bag?
哪个是你的包？
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）。