科学家们认为很久以前在那个行星上可能有水存在。
Scientists think there was probably water on the planet long ago.
科学家们认为，在木卫二的海底可能存在这样的化学物质。
Scientists believe there might be such chemicals lying at the bottom of Europa's ocean.
科学家们认为在大气层下存在着一层由碳和氧组成的稀薄地壳。
Under the atmosphere, scientists think there is a very thin crust of carbon and oxygen.
科学家们认为这是不可能的。
科学家们认为鲸可以活二十到三十年。
Scientists believe that whales can live for twenty to thirty years.
科学家们认为，不断上升的海面温度是罪魁祸首。
The scientists believe that rising sea surface temperatures are to blame.
科学家们认为，不知感恩的人实际上是自欺欺人。
Ungrateful people are actually cheating themselves, scientists believe.
科学家们认为鲸可以活二十年到三十年。
Scientists believe that whales live for twenty to thirty years.
因为她的头骨相对小而轻，科学家们认为她是女性。
Scientists believe she was a female because her skull is relatively small and lightly built.
科学家们认为，这些水来自于月球本身。
刚开始，科学家们认为可能某种新型疾病是罪魁祸首。
At first, scientists thought a new strain of disease might be responsible.
科学家们认为小恐龙看起来应该像这样子。
科学家们认为，在这篇报告中还有一些令人惊讶的因素。
There were also some surprising elements to the report, scientists say.
科学家们认为，使计算机听懂人的话是可能的。
Scientists think it practical for a computer to be made "hear" human speech.
但其他科学家们认为，肉这种食物来源在当时是极其不稳定的。
But meat would have been an unreliable food source, say other scientists.
科学家们认为地球是被岩石构成的巨大板块覆盖着。
Scientists think that the earth is covered by huge plates made of rock.
科学家们认为这种改变直接和握柄的运用技术相联系。
Scientists think that this change is directly linked to the use of handheld technology.
科学家们认为这些美妙的事情在未来可能会变成现实。
Scientists think that wonderful things may come true in the future.
科学家们认为人们在同一段时间只能专注于一个想法。
Scientists believe that you usually attend to one idea at a time.
很明显，科学家们认为恐惧是由于学习而产生的反应。
科学家们认为，他们离治疗血吸虫病的新药物更近了一步。
Scientists think they are a step closer to a new drug to treat schistosomiasis.
科学家们认为海洋的酸性已经比上个世纪稍微大了一点。
The world's oceans are slowly getting more acidic, say scientists.
科学家们认为火星上曾经有过生命，甚至现在也还可能有。
Scientists think that there was, and even can still be, life on Mars.
而就在此次会议上，科学家们认为不太可能将发生一次大地震。
At this meeting, the scientists determined it was unlikely that a major quake would hit.
科学家们认为由于胰岛素从血液中夺走太多糖分导致能量暴跌。
Scientists believe that insulin might pull too much from your blood, causing an energy nosedive.
早些时候的科学家们认为，在人的一生中，大脑的机能会逐渐减弱。
Earlier scientists thought that during a man's lifetime the power of his brain decreased.
直到最近，科学家们还认为光是必不可少的。
Until recently, scientists thought that light was essential.
直到最近，科学家们还认为其他星球上的生命只是一个充满希望的梦。
Until recently, scientists believed that life on other planet was just a hopeful dream.
直到最近，科学家们还认为其他星球上的生命只是一个充满希望的梦。
Until recently, scientists believed that life on other planet was just a hopeful dream.
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