He colored his room into green to make it cooler in summer.

他把房间刷成绿色以便在夏天更凉快一些。

youdao

Have the room slightly cooler.

让房间凉快一点。

youdao

Keep cool - you fall asleep faster and sleep better if the bedroom is cooler. A lower room temperature lowers core body temp, and helps you go to sleep.

温度低一点—如果卧室温度低一点，那你能更快入梦，睡眠质量也会更好。卧室里的温度低一点可以降低身体活动的温度，从而有助你入睡。

youdao

Or in many kinds of gas refrigerators where you push a gas through a nozzle close to room temperature, what you find is that the gas coming out on the other side under lower pressure is cooler than the gas that went through on the other side.

或者在很多种压缩气体式冰箱中,你让气体通过接近室温的管口,你会发现从压力低的一边,出来的气体比通过,另一边的气体更冷,真正的冰箱实际上通过。

麻省理工公开课 - 热力学与动力学课程节选

My fervent hope is that your exit from the ranks of the small and cool makes room for someone else even cooler.

FORBES: Zipcar: Keep Driving Me Crazy. Please.

Where a chance meeting by the water cooler in the break room at work could very well end with a trip down the aisle.

FORBES: Connect

About a year ago, jBilling also started an online chat room that functions as an office water cooler.

WSJ: Hunt for Engineers Leads to Scattered Workforces