She won't be happy when she sees what you've done with your hair.
当她看到你将头发搞成这个样了了,就高兴不起来了。
It will help me understand the point you are trying to make.
这会帮助我了解你们的重点。
This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.