The cat arches its back when scared.

猫受到惊吓时会把背拱起来。

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What we crave when scared, bemused and broke is a cheap fix of sugary solace.

当我们恐惧，困惑和破产的时侯，一丝廉价的甜美安慰便能满足我们的渴望。

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The referee declares a victory when he feels certain that one bull has been scared off by another.

VOA: standard.2010.03.22

You can find a whole- you can sort of find a deep and abiding kind of American nationalism still in a lot of these budding Southern patriots, even by the 1850s, especially when they get scared about what secession might actually mean.

你会发现,可以说你会发现一种深层持久的,美国民族主义仍旧根植于许多,南方爱国者们心中,甚至到十九世纪五十年代还是如此,特别是当他们开始害怕,脱离联邦会导致何种不可预料的结果

耶鲁公开课 - 美国内战与重建课程节选

for when you want to express that you are scared of something or someone,

当你想表达你对某事或某人很恐惧的时候，你就可以使用这个句型。

I'm afraid of 课堂 - SpeakingMax英语口语达人

We learned early on that I, the novice, when scared, expressed anger.

BBC: How to get along for 500 days alone together

"When I see that happen, I don't want to tell you now, but I feel a little scared when I was pitching, " De La Rosa said.

WSJ: De La Rosa outduels Kuroda, Rockies beat Yanks 2-0

"When they get scared, they pee themselves, " Mr. Henen said, referring to the tortoises.

WSJ: An Army of Biologists Are on Nature Patrol at Military Bases