They were inconsolable when their only child died.
他们唯一的孩子去世时，他们简直痛不欲生。
Some men are aroused when their partner says erotic words to them.
一些男人在性伙伴对他们说色情话时会被撩起性欲。
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。
It will come as a rude shock when their salary or income-tax refund cannot be cashed.
如果他们的薪水或所得税返还不能兑现，那对他们将是一个晴天霹雳。
They were cut off from the West in 1948 when their government closed that border crossing.
当他们的政府于1948年封锁了那个那个边境通道以后，他们与西方国家的联系就被切断了。
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。
When their voices died away there came cold silence over the lagoon, and then a feeble cry.
当他们的声音渐渐消失的时候，泻湖上空出现了冰冷的寂静，接着是一声微弱的哭声。
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。
She and her husband started out limiting TV time when their kids were little, but then technology crept in.
她和丈夫在孩子很小的时候就开始限制他们看电视的时间，但是突然间，科技产品悄悄来临。
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。
When their stepmother opened it, she exclaimed, "You naughty children, why have you been staying so long in the forest?''
当他们的继母打开它时，她喊道：“你们这些淘气的孩子，为什么在森林里呆这么久？”
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。
Most mammals reach sexual maturity when their growth rates are in recession, while humans experience a growth spurt during adolescence.
大多数哺乳动物达到性成熟时，它们的生长率处于衰退状态，而人类则在青春期经历性成熟的激增。
If they had failed to find the gumdrop, the two men in spider would have been stranded in the orbit to die when their oxygen supply ran out.
要是他们没找到橡皮糖，在支架里的两个人，等他们的氧供应用完了，便在轨道里窒息而死了。
Although they are both gainfully employed, they did cleaning jobs into their nights and weekends which is when their service is in most demand anyway.
他们虽然都有高薪工作，但仍在晚上和周末的时间做清洁工作，而这正是他们的服务需求量最大的时候。
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。
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。
A great leader will assess each situation on its merits, and will only take charge when their position, the situation, and/or the needs of the moment demand it.
一个伟大的领导者会评估每一种情况的好坏，并且只会在他们的职位、情景和/或当前的情况需要的时候挺身而出。
The research argued that boys often perform badly in mixed schools because they become discouraged when their female peers do better earlier in speaking and reading skills.
研究认为，男孩通常在男女混合学校的表现不好，因为当其女性同龄人比他们更快地在口语和阅读技能上做得更好时，他们会灰心。
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。
That's when their mother said, "Go ahead."
这时他们的妈妈说：“去吧。”
Pet owners are happy when their pets are well.
如果宠物身体状况良好，主人们就会感到高兴。
Many people can't remember exactly when their mothers' birthdays are.
许多人不能准确地记得他们母亲的生日是什么时候。
Many people can't remember exactly when their mothers' birthdays are.
许多人不能准确地记得他们母亲的生日是什么时候。
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