They were passed down orally within cultures from generation to generation, so they changed a lot over time.
它们是在某一文化领域内代代口头相传下来的，所以随着时间的推移，它们也发生了很大的变化。
First, they changed their goals.
首先，他们更改了其目标。
But then they changed the rules.
但是他们改变了规则。
The reason why they changed the plan is unknown.
他们改变计划的原因并不清楚。
后来他们改变了世界。
And because they did, they changed the world.
正是因为他们的行动，世界发生了改变。
Nobody liked it, and this year, they changed it back.
没人喜欢弄成这样，于是今年，又都变回了老样子。
I didn't think about that. I simply saw that they changed.
对于这个问题，我连想都没有去想过，只是每天看到它们一直在变化着。
And probably that was the reason why they changed directions.
这恐怕就是他们改道而行的原因。
I thank them because they changed my life in many important ways.
我对他们表示感谢，因为是他们使我的生活发生了许多重大变化。
Some were friends, some were enemies, but they changed all the time.
有些是朋友，有些是敌人，可他们不停地变。
It does make me wonder if they changed their taste, though. I might try it one day to see.
不过新包装的确让我想知道百事可乐是否换了口味，所以我哪天或许会尝一尝。
Undaunted, our friend continued: “And how come they changed the city’s name in the first place?”
这位朋友也并不在乎是否有人回答，又问道：“那他们为什么要改掉一个城市的名字呢？”
But right when we thought we had Apple's place in the market pegged, they changed the world... with a phone.
我们刚把苹果归到小众那一拨里，苹果就改变了世界——仅凭一只手机。
At one point, Chamberlain was so much better than all the other players that they changed the rules of the game to try to stop him.
曾几何时，张伯伦比其他的队员都优秀的多，以至于他们改变了比赛规则来企图限制他。
Swedish teaching unions initially hated the whole idea of free schools-but once they saw that their members liked working in them, says Mr Hultin, they changed their tune.
Hultin先生说，瑞典教学联盟开始痛恨自由学校的整个想法，但是他们看到他们的成员喜欢在自由学校工作后也改变了态度。
Chefs specializing in Chinese cuisine want Americans to try their food. So they changed the ingredients, the cuts of meat and the presentation to suit American palates.
擅长做中餐的厨师想让美国人尝尝他们的手艺。于是他们依据美国人的喜好调整了配料、切肉的手法和摆盘的样式。
The scientists have analysed the comets in the Oort cloud and deduced that 25 per-cent of them would need a nudge by a body of at least Jupiter size before they changed orbit.
科学家已经分析了奥特云中的彗星，并得出推论称，其中25%的彗星在它们改变运行轨道前，需要至少木星大小的星体提供推动力。
他们改变了论调。
They changed the yard into a garden.
他们将庭院改成了花园。
They changed their routines in space.
他们在太空中改变了自己的日常生活习惯。
They changed their orbit while in space.
在太空飞行时他们改变了轨道。
They changed the plans at the last minute.
事到临头他们却改变了计划。
They changed their dwellings from time to time.
他们不时地改换住宅。
They changed the desolate hand into a prosperous town.
他们把这个不毛之地变成了一个繁荣的小镇。
They changed the rule when this was the right thing to do.
当这是一件正确的事的时候，他们改变了规则。
They changed the rule when this was the right thing to do.
当这是一件正确的事的时候，他们改变了规则。
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