这样的事情有时候就在我们的眼皮底下发生。
“有时候，糟糕的事情会一次又一次地发生，我们永远不知道为什么，”米歇尔说，希望她能做点什么来减轻她的痛苦。
"Sometimes, bad things happen again and again, and we never understand why, "Michele said, wishing ther was something she could do to ease her pain.
有时，“母斑”会发生在隐秘的部分（例如腋窝）并且不能马上被发现。
Occasionally, the "herald patch" may occur in a hidden position (armpit, for example) and not be noticed immediately.
然而，不幸的是，它有时偏偏也会发生。
由于我们对虚拟世界中发生的事情太过心不在焉，我们中的一些人已经失去了交谈技巧，有时甚至无法分辨一个人是否快乐。
As we're too absent-minded by what's happening in the virtual some of us have lost conversational skills and sometimes can't even tell whether a person is happy or not.
由于这些数据有时相互矛盾，而且其机制也不时发生明显的变化，这些研究变得复杂起来。
The studies are complicated by the fact that the data are sometimes contradictory and the mechanisms apparently change from time to time.
化石记录表明，在地球有动物居住的所有时期，已经有五次大灭绝发生，恐龙是最近的一次。
The fossil record indicates that in all the time that animals have inhabited Earth, there have been five great mass extinctions, dinosaurs being the most recent.
一辆被盗的车比由车主驾驶的同样的车更容易发生事故；偷车贼通常是年轻人，有时还喝醉了酒。
A stolen car is also far more likely to be involved in an accident than the same car driven by its owner; car thieves are often young and sometimes drunk.
同意“有时候打孩子屁股是可以的”的人占的比例下降到72%，虽然大多数研究者认为，实际上体罚事件发生的更频繁了。
The proportion who said it is "sometimes O.K. to spank a child" had fallen to 72%, though most researchers believe the actual incidence of it is higher.
有时我们会给彼此一个友好的微笑或打招呼，但很多人甚至不知道他们的邻居的名字！当你不认识某人时，在你认为不公平的事情发生时生气。
Sometimes we share a friendly smile or say hello, but lots of people don't even know their neighbor's names! When you don't know someone, it's easy to be angry when something has happened that you think is unfair.
但糟糕的事情发生在很多人——有时是一群人——身上。
But bad things happen to lots of people - sometimes in groups.
如果结果证明它是无用的，不奇怪，有时会发生这样的事情。
If it turns out to be useless, well, that happens sometimes.
但是，在青春期的整个过程中，身体常常会发生其他变化——有时这些变化与我们期望的很不一样。
But the body often goes through other changes before, during, and after puberty - and sometimes these changes can be very different from the ones we expect to happen.
有时，发生在单元测试中的错误不是由断言抛出的。
Sometimes errors occur in unit tests that aren't thrown by assertions.
打开你的有线电视台，你可以立即看到最新的灾难影像，有时，它还是“实时”地发生的。
Turn on your cable stations and you can immediately see the latest catastrophe — sometimes as it is actually happening in "real time".
有时他对自己的回忆发生怀疑。
There were moments when doubts as to his own recollections occurred to him.
你有时不易意识到周围发生的事情。
At times, it is hard for you to make sense of what is happening to you and to others around you.
从而让不可能的事情发生。有时候只要一个女人拒绝让出她的座位整个世界都会群情激昂。
Sometimes, all it takes is one woman to refuse to give up her seat for the entire world to be set on fire.
有时候，你可以根据一些发生在你身边的事情来创造角色，有时候，根据你遇见的人或者事来创造角色也不错。
Sometimes you can just create characters as they occur to you, at other times it is good to create characters of people you see or meet.
道路行驶也依然很危险，因为水继续从山上向下流，有时还发生小型的山体滑坡。
Road travel is also still dangerous as water continues to flow down from mountains, while minor landslides occur from time to time.
随着地球、月球和太阳相对位置的逐渐变化，每年所发生的日食次数也不尽相同，有时候在一年之内会发生多达五次的日食。
Solar eclipses can happen up to five times a year, although each year is different due to variations in the positions of Earth, the moon, and the sun over time.
有时，因为某些事情的发生，他们会改变想法。
像航天飞机这样如此复杂的机器，发生的故障有时并没有那么严重，大多数故障都可以自行排除，或者影响很小。
The reverse side of failures in a machine as complex as the shuttle is that most of them can be worked around, or turn out to be small.
有时设置需求的出资方更加了解俄他们的需要，并且随时更新需求；有时他们的需求是由于上下文的变化而发生改变。
Sometimes the stakeholders who set requirements gain better understanding of their needs and update requirements in flight; sometimes their needs actually change because of changes of their context.
经历如此多的步骤，错误便经常发生，毒素有时也使完整塑成的蛋白脱离正轨。
And with so many steps, mistakes often occur, or toxins push a perfectly configured protein out of place.
医生们说，中暑的发生，有时候很少有征兆，甚至可能在你剧烈运动半小时后就会发生。
Heatstroke can strike with scant warning, even after as little as a half hour if you are exercising hard, doctors say.
医生们说，中暑的发生，有时候很少有征兆，甚至可能在你剧烈运动半小时后就会发生。
Heatstroke can strike with scant warning, even after as little as a half hour if you are exercising hard, doctors say.
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