Sideproduct
副产品
🗣️ 情景例句
And good luck! I've got to go.
祝你好运 我得走了。
I ate eggs for breakfast yesterday.
我昨天早饭吃的是鸡蛋。
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）。