provided (that)

剑桥词典

if, or only if
如果；只要
He's welcome to come along, provided that he behaves himself. 他只要守规矩就欢迎他来。

例句

• We'll be there at about 7.30, provided that there's a suitable train .
• Provided that there are enough seats , anyone can come on the trip .
• Provided that the boat leaves on time , we should reach France by morning .
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