谢谢你的建议，他对我们非常有用。
我得说这些对我们非常有用！
因特网对我们非常有用。
这本书对我们非常有用。
计算机对我们非常有用，互联网是收集信息的重要设备。
Computer is very useful for us. The Internet is a great facility for collecting information.
对于人类而言，机器是生活中不可缺少的部分，而在科技发达的今天，机器人更能为我们分担一些繁琐的事情，是我们生活中的好帮手，好朋友。总之，机器人对我们非常有用。
For humans, the machine is an indispensable part of life, and in the technological era, the robot more complicated for us to share some things in our lives short, the robot very useful to us.
我们的广告系统功能是强大，但它太复杂，容易把许多小的本地的广告商搞糊涂，而他们手上有许多对我们的用户来说非常有用的产品和服务。
While our ad system has powerful features, it is also complex, and can confuse many small and local advertisers whose products and services could be very useful to our users.
树木是人类的朋友，他们对我们是非常有用的。
Trees are human's friends and they are extremely helpful to us.
扩展他的理解对我们国家和它是遗产会是非常有用对他作为全国导游在中国，因为他旅行与美国游人每天谁访问中国。
Broadening his understanding of our nation and it's heritage would be very useful to him as a national Tour Guide in China, as he travels with American tourists everyday who are visiting China.
扩展他的理解对我们国家和它是遗产会是非常有用对他作为全国导游在中国，因为他旅行与美国游人每天谁访问中国。
Broadening his understanding of our nation and it's heritage would be very useful to him as a national Tour Guide in China, as he travels with American tourists everyday who are visiting China.
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