Nature..has not provided against assaults upon the hearing.
出自:TimesThe document provided..for the resumption of full diplomatic relations.
出自: G. F. KennanThe contract provides that only the best materials shall be used.
合同规定说只允许用最好的材料。
I will go provided (that) you will go with me.
两句意思一样,但注意两者不能随便替换。
What will happen if they see us?
句中的if不可以替换成provided。不过通常来说,用provided的场合,用if都是可以的。