I also recommend trying out these apps on a spare computer, first -not your main machine.

我也推荐你首先在一个无关紧要的电脑上先试试这些工具——不要在你的重要电脑上先试。

youdao

I won't install software like this on my main machine without knowing everything that's going to be installed.

在不了解会装些什么东西的前提下，我是不会在自己的主要机器上装这种软件的。

youdao

The main machine USES the stepless regulation, with stable performances.

主机采用无级调速，性能稳定。

youdao

Our correspondent added that the back-up computer on the rover had previously been used to test software updates before they were installed on the main machine.

BBC: Mars rover

Then, in 1975, a change of government brought a change in policy and Prof Randell was invited to the Cabinet Office to discuss the first official release of information about the Allies' main codebreaking machine.

BBC: The road to uncovering a wartime Colossus

But then you have to consider the limitations of the Chrome OS - it's great if your life is in the "Cloud" and you want an always-online machine whose main function is email, web surfing and social media, but limited if you want to use other applications.

BBC: Who'll pay for a Pixel?