Scientists have sounded a note of caution on the technique.
科学家已告诫人类慎重对待这项技术。
Some scientists have voiced concern that the disease could be passed on to humans.
一些科学家已经表示，担心这种疾病可能会传染给人类。
Scientists have established a connection between cholesterol levels and heart disease.
科学家已证实胆固醇含量与心脏病之间有关联。
Social scientists have grown extremely unwilling to make value judgments about cultures.
社会科学家们已经变得非常不情愿对文化作出主观的价值评判。
Already some people are asking whether scientists have any right to meddle in such matters.
已经有些人在问科学家是否有权利去干涉此类事情。
Scientists have used genetic engineering to protect tomatoes against the effects of freezing.
科学家们已利用基因工程来保护番茄不受严寒的影响。
Scientists have found a genetic mutation that appears to be the cause of Huntington's disease.
科学家们已经发现一个似乎是亨廷顿病病因的遗传突变。
Scientists have discovered remarkable new evidence showing how the body rebuilds itself while we sleep.
科学家们已经发现了非同寻常的新证据，证明睡眠时我们的身体如何自行恢复。
Until now, scientists have made three kinds of drugs.
到目前为止，科学家已经研制出了三种药物。
Scientists have found out some key principles operating in food webs.
科学家们已经发现了在食物网中起作用的一些关键原理。
Scientists have advanced many theories about why human beings cry tears.
关于人类为什么哭的时候会流泪，科学家已经提出了很多理论。
Scientists have explored this idea with other endearing creatures: babies.
科学家们已经用其他可爱的生物——婴儿——来探索了这个想法。
Scientists have identified thousands of known ants species around the world.
科学家们已经确认了世界各地数千种已知的蚂蚁种类。
Scientists have different theories as to why there's a relationship between the two.
对于两者之间关系的由来，科学家们有不同的理论。
Scientists have a fairly negative attitude to the theory.
科学家对这个理论的态度是相当消极的。
Scientists have identified a link between diet and cancer.
科学家发现了饮食与癌症之间的关联。
The scientists have experimented on the tiny neck arteries of rats.
那些科学家已在老鼠细小的颈动脉上做了实验。
Scientists have always been aware of how fear can rule our lives and make us ill.
科学家们从来都知道恐惧是如何严重影响我们的生活并使我们患病的。
Chinese scientists have successfully cloned two monkeys.
中国科学家成功克隆了两只猴子。
Scientists have discovered huge waves in the arctic waters.
科学家在北极水域发现了巨浪。
Now, some scientists have come up with some different ideas.
现在，一些科学家提出了一些不同的想法。
Scientists have found that the virus probably came from bats.
科学家们发现，这种病毒可能来自蝙蝠。
Scientists have found several species (物种) near the whale fall.
科学家在鲸落附近发现了少数生物物种。
Scientists have long wondered what lies on this side of the moon.
长期以来，科学家们一直想知道月球的这一边有什么。
Now scientists have found exactly when these memories disappeared.
现在，科学家们已经找到了这些记忆消失的确切时间。
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