One of the greatest heartbreaks for fire fighters occurs when they fail to rescue a child from a burning building because the child, frightened by smoke and noise, hides under a bed or in a closet and is later found dead.

出自-2010年12月听力原文

But in a new study, researchers demonstrated for the first time how this effect occurs in the brain.

2017年6月四级真题（第二套）阅读 Section C

El ni?o, Spanish for "the child", occurs when surface ocean waters in the southern Pacific become abnormally warm.

2015年12月四级真题（第三套）阅读 Section A

Soreness occurs since your leg muscles aren't used to that movement.

2019年12月四级真题（第一套）听力 Section C

Reinforcement occurs when we receive direct or indirect rewards or punishments for particular gender role behaviors.

出自-2013年6月阅读原文

Social learning theories contribute to our understanding of why we behave as we do, but much of the emphasis is on early socialization rather than on what occurs throughout life

出自-2013年6月阅读原文

The difference occurs when someone needs to drink.

出自-2013年6月听力原文

Conformation occurs when others treat you in a manner consistent with who you believe you are

出自-2013年6月听力原文

On the other hand, rejection occurs when others treat you in a manner that is inconsistent with yourself definition.

出自-2013年6月听力原文

The third type of feedback is disconfirmation, which occurs when others fail to respond to your notion of self by responding neutrally

出自-2013年6月听力原文

In West Africa, people have long chewed kola nuts as stimulants, because they contain caffeine that also occurs naturally in tea, coffee, and chocolate.

2017年12月六级真题（第一套）阅读 Section C

On the other hand, Ericsson(1993) suggests that the most effective learning occurs through involvement in highly structured activities defined as deliberate practice.

2015年高考英语上海卷 阅读理解 阅读表达 原文

The first step in awakening senses is to stop predicting what we are going to see and feel before it occurs.

2018年高考英语天津卷 阅读理解 阅读D 原文