Ifelse
如果…否则
🗣️ 情景例句
Did you know her husband has a secret lover?
你知道她的丈夫有一个秘密情妇吗？
Please sit down and have a glass of milk.
请坐下来喝一杯牛奶。
The continents form rugged tablelands which stand nearly three miles above the floor of the open ocean.
大陆是崎岖不平的高地，高出辽阔海洋海底近三英里。