Serry
vi.拥挤,密集,紧排 \\nvt.使(军队行列等)靠拢,使排紧
🗣️ 情景例句
Can I help with anything?
我能帮什么忙吗
Do you have some change?
你有零钱吗？
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）。