Valvate
a. 有閥的, 用閥開的, 有閥門功能的\\n[醫] 有瓣的
? 同義詞
??? 情景例句
Do we have to pre-book tours, or can we get them on site?
我們必須預定行程， 還是到那個地方再說？
I can't tell you how sorry I am.
我不知道我該怎樣道歉。
It is eight o'clock.The children go to school by car every day, but today, they are going to school on foot.
現在是8點鐘。孩子們每天都乘小汽車去上學，而今天，他們正步行上學。