Contempt can also be a useful tool.

蔑视也可以是一个有用的工具。

A block diagrams is very useful tool in teaching.

在教学中,框图是一种很有用的工具.

In short, federalism is both a problem and a useful tool.

总之, 联邦制既存在着问题又是个有用的工具.

A very useful tool for scale - up is the dimensionless group.

在放大中使用的一个很有用的工具是无量纲数群.

But the Schumer bill could prove to be a useful tool to Obama.

不过,对奥巴马来说,舒默提出的议案可能会是一个有用的工具.

It is a very useful tool for learning about Ruby and its modules.

Ruby 控制台是学习 Ruby 及其模块的一个非常有用的工具。

And we should not imagine that it is.But it is a very useful tool.

并且我们也不应该这样设想，但是这确实是一个很有用的工具。

They are also a useful tool for us in studying and analyzing past wars.

这对于我们学习和分析过去的战例同样是个有用的工具.

GTD is just a tool, but it is a very useful tool, and I highly recommend it for anyone trying to make dreams a reality.

GTD 仅仅是一个工具，但它是一个非常有用的工具，我强烈推荐所有想要实现梦想的人们都来用它。

Catnip can prove to be a very useful tool for a few common problems with your cat.

猫草可以证明是一个与你的猫一些共性问题的非常有用的工具。