Did you come to London for the purpose of seeing your family, or for business purposes?
你到伦敦来的目的是为了要看望家人还是为了公事?
He stole out of the house without anyone seeing him.
他悄悄地溜出了房子,没有人看见他。
seeing that she's legally old enough to get married, I don't see how you can stop her.
鉴于她已经到了法定的结婚年龄,我想象不出你怎么可以阻止她。