The heat is on now that the election is only a week away.

离选举只有一个星期了，因此大家开始感觉到有压力了。

《牛津词典》

The heat is on. Take action.

这是有去无回的死路一条。

youdao

To perform well when the heat is on , all you have to do is let it happen.

要正在大的压力上表隐出色，你要做的是任之发生。

youdao

The heater is on, it's producing heat until a negative signal is registered, 'oh we've gone too high', and then it turns off.

加热器会开着,一直产生热量直到它得到一个关闭的信号,噢我们弄得太热了,然后就关闭了

耶鲁公开课 - 生物医学工程探索课程节选

Or I could have a non-adiabatic, I could take the same temperature change, by taking a flame, or a heat source and heating up my substance. So, clearly q is going to depend on the path.

也能改变温度，绝热指的是没有热传递，在非绝热条件下，也同样可以升温,比如用火或者热源加热，这样，q也应当与路径有关。

麻省理工公开课 - 热力学与动力学课程节选

Non-profit bosses tend to muck in with volunteers when the heat is on (you'll find them, for example, helping to stuff goody bags for fund-raising events).

ECONOMIST: Schumpeter

Now the heat is on for Berezovsky and Glushkov.

FORBES: Follow Through

In the '90s, Will Smith's summer anthem "Miami" described a never-ending spring break-like atmosphere, surpassing New York and Los Angeles as the place to "party in the city where the heat is on, all night on the beach 'til the break of dawn".

BBC: This is Miami week