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

so it comes with like the Queen tea, cucumber sandwiches, cakes,

那么它可以是女王茶搭配黄瓜、三明治、蛋糕、

来一杯红茶怎么样？ - SpeakingMax英语口语达人

"We have broccoli,spinach, cucumber,beets."

VOA: standard.2010.03.10