1.familiar with 熟悉的
Most people are familiar with this figure from Wagner's opera.
多数人都熟悉瓦格纳歌剧中的这一人物。
2.for the better 好转
Our 10-page guide will help you to change your life for the better.
我们这本10页的指南有助于您提高生活品质。
3.a number of 一些
Two significant constants have been found in a number of research studies.
若干研究已经发现了两个重要常量。
4.in practice 实际
This is certainly a theoretical risk but in practice there is seldom a problem
从理论上讲，这肯定是有风险的，可是实际上很少出问题。
5.be worthy of 值得
They regard the problem as not worthy of serious consideration.
对这一问题他们都认为不屑一顾。
