Pitting
n. 锈斑, 凹痕\\n[化] 点状腐蚀
🗣️ 情景例句
Can I talk to you?
能和你谈一下吗？
Do you like water-skiing?
你喜欢滑水？
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）。