Effectivity
n. 有效, 功效
🗣️ 情景例句
are going to have a wonderful, romantic weekend!
将度过一个美妙浪漫的周末！
What is the way to the airport?
哪一个方向是去飞机场？
She does, doesn't she! I read she's twenty-nine,- but she must be at least forty.
是的，谁说不是呢！我从报上看到她是29岁，但她一定至少有40岁了。