Jet lag is caused because the body clock does not readjust immediately to the time change.
时差是因为生物钟没有立即适应时间的改变而引起的。
There's still time to change your mind.
你还有时间改变主意。
I didn't have time to change clothes before the party.
我没时间在聚会前更换衣服。
Mars and Earth have orbits which change with time.
火星和地球的轨道随着时间而发生改变。
It's time to try a change of tactic.
现在是改弦易辙的时候了。
Some plastic materials change over time.
有些塑料随着时间的推移而改变。
We also know that a long time without change or challenge can lead to boredom, and physical and mental strain.
我们也知道，长时间没有变化或缺乏挑战会导致无聊，造成身体和心理上的疲惫。
People forget that things change all the time," he says.
“人们忘记了事情总是在变化，”他说。
The studies are complicated by the fact that the data are sometimes contradictory and the mechanisms apparently change from time to time.
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。
There wasn't time to shower or change clothes.
没时间洗澡或换衣服了。
Opinion polls indicated a feeling among the public that it was time for a change.
民意测验表明，公众觉得该是改变的时候了。
Change will come, but it will take time.
变化会有的，但需要很长时间。
The 1960s and early 1970s were a time of change and turbulence.
20世纪60年代和70年代初期是个变革和动荡的年代。
You can expect to pay the bank a fee of around 1% to 2% every time you change money.
每次兑换钱时，你要准备支付银行约1%至2%的费用。
I had to change schools every time my parents flitted.
我父母每次迁居，我都得换学校。
At half-time the teams change ends.
球队在半场时交换场地。
Today I can spend quality time with my family for a change.
今天我可以调剂一下，与我的家人一起享受天伦之乐了。
Some are so pressed for time that they change clothes in the taxi.
有些人时间紧迫，他们在出租车里换了衣服。
These opinions will change with time, and vary from place to place.
这些观点会根据时间和地点的不同而改变。
I also want to change myself but failed each time.
我也很想改变自己，但每次都失败了。
He had to change the furniture delivery time.
他不得不更改家具的交货时间。
Ecosystems change over time, with or without the involvement of mankind, so no one can tell what Hawaii should look like.
不管有没有人类的影响，生态系统都会随时间演变，因此没有人可以说出夏威夷看起来应该是什么样的。
It means that the properties of the system, the properties that describe the system, don't change in time or in space.
这意味着系统的性质，用以描述系统的性质，不随时间或空间改变。
到了下一次我们会调换工作。
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