He is as cool as a cucumber.

他是个相当冷静的人。

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Cool temperature can make cucumber's skin go bad faster, so find a dry and cool place at room temperature for your cucumber.

低温会让黄瓜的表皮更快变坏，所以找一个干燥凉爽的地方放置你的黄瓜吧。

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The choices for "warm" and "cool" foods range from simple sea cucumber to the delicacy of bird's nest soup, depending on the individual's economic circumstances.

“温性”与“凉性”食物的选择从简单的海参到美味的燕窝汤不等，视个人经济情况而定。

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You might say a person is as cool as a cucumber if he never seems to worry about anything and stays calm in a stressful situation.

VOA: special.2011.02.13

He was cool as a cucumber in his seersucker suit.

CNN: Mardi Gras 2006

Jutting out of London's skyline in all its futuristic glory, the "Gherkin" building has managed in the last few years to embed itself in the city's psyche as an icon, an edifice that just looked as cool as a cucumber.

FORBES: Magazine Article