Now that the children are old enough to fend for themselves, we can go away on holiday by ourselves.既然孩子们已长大能照顾自己了，我们就可以单独出去度假了。All of their children are grown now.他们的孩子现在都已长大。He is old enough to know right from wrong.他已长大，能够辨别是非了。He has outgrown his credulity.他已长大成熟而不再轻信。