1570s, "a vessel in which something is set to cool," agent noun from cool (v.). Meaning "insulated box to keep things cool" is from 1958. Slang meaning "jail" is attested from 1884.
双语例句
1. Things are cooler and more damp as we descend to the cellar.
当我们往下走去地窖时，四周愈见阴冷潮湿。
来自柯林斯例句
2. Kim opted for cooler blues and yellows in the master bedroom.
金为主卧室挑选了偏冷色调的蓝色和黄色。
来自柯林斯例句
3. The water was slightly cooler than a child's bath.
这水比小孩的洗澡水稍微凉一些。
来自柯林斯例句
4. Paint the background tones lighter and the colours cooler.
