There was complete anarchy in the classroom when their usual teacher was away.
任课老师不在时，班上一片混乱。
He is one of the reservists who will plead not guilty when their cases come up.
他是其中一个在案件审理时将申辩无罪的后备役军人。
They were on their way to the airport when their van was involved in a collision with a car.
他们正往机场赶路的时候，其货车和一辆小汽车相撞了。
That the pair won when their rivals were terrific too is also impressive.
这对搭档在他们的对手也很棒的情况下获胜，这也令人印象深刻。
For old people, a dog is also a child when their real children have grown up and left.
对于老年人来说，当他们真正的孩子长大离开时，狗也能成为他们的孩子。
Others have been stranded at the sea when their scooters either failed or sank far from shore.
另一些人因为他们的水上摩托车失灵或在远离海岸的地方沉没而被困在海上。
Thousands of bees left a town after landing on the back of a car when their queen got stuck in its boot.
蜂后被困在汽车的后备箱里时，成千上万只蜜蜂飞到车后，跟随这辆车离开了这个小镇。
It follows that melon plants have a lower-than-usual rate of photosynthesis when their roots are in rain-soaked soil.
因此，当瓜类植物的根在雨水浸湿的土壤中时，它们的光合作用率低于通常水平。
It was important to the ancient Egyptians to know when their Nile based seasons would occur, their way of life depended upon it.
对古埃及人来说，知道尼罗河季节的时间是很重要的，他们的生活方式取决于尼罗河季节什么时候来临。
They are more likely than women to cry when their core identities—as providers and protectors, as fathers and fighters—are questioned.
当他们作为供养者和保护者、父亲和战士的核心身份受到质疑时，他们比女性更容易哭泣。
Accustomed to seeing As and Bs on high school report cards, they may be upset when their children's first-semester college grades are below that level.
他们习惯于在孩子的高中成绩单上看到 A和B，所以当他们的孩子大学第一学期的成绩低于这个水平时，他们可能会感到不安。
The researchers discovered that the number of risks teens took more than doubled when their friends were watching, compared with when they played alone.
研究人员发现，与单独玩耍时相比，青少年在朋友旁观时所承担的风险是前者的两倍以上。
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere.
每块阿伦德碎片样本都覆盖着一层黑色的、玻璃样的熔壳，这层熔壳是在它们的外表面与地球大气层摩擦减速中熔化形成的。
This shows that teens may find it more difficult to control risky behavior when their friends are around, or in situations where they are extremely angry.
这表明，当他们的朋友在身边，或者在他们极度愤怒的情况下，青少年会发现更难控制危险行为。
Active learners are constantly monitoring their understanding, they know when their comprehension breaks down, and they ask for help before they become lost.
主动学习者不断地监测自己的理解，他们知道自己的理解什么时候出现了问题，在迷失方向之前就会寻求帮助。
Student tutors feel upset when their teachable students fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else's accomplishment.
当能教导的学生学习不理想时，学生导师会感到沮丧，但当这些虚拟学生学习获得成功时，他们会感到愉悦，因为他们能从他人的成就之中获得自豪和满足。
Rough calculations show that the savings made by employers when their staff works from home are of similar value to the compensation workers should receive for setting up offices at home.
粗略计算表明，当员工远程办公时，雇主节省下来的费用与员工在家设置办公室所应得的补偿价值相当。
The team suffered a major setback when their best player was injured.
最优秀的队员受了伤，使得这支队伍的实力大打折扣。
Many parents feel a sense of loss when their children leave home.
孩子们离家后许多父母都会有失落感。
"What our study suggests is that teenagers learn more quickly and more effectively when their peers are present than when they're on their own," Steinberg says.
“我们的研究表明，与独自一人相比，青少年在有同伴在场的时候会学习得更快、更高效。”斯坦伯格说。
It's a dramatic endorsement for a technology most people think about only when their smartphone goes dark.
对于一项大多数人只有在智能手机黑屏时才会想到的技术来说，这是一个戏剧性的认可。
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