Ifelse
如果…否则
🗣️ 情景例句
Hello, Richard. I found your bag!
哈啰，Richard， 我找到你的旅行袋。
What are these things doing here?
这些东西怎么会在这里？
It was j-223,just double the second item.
j-223第二项的订量要加倍。