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(单词翻译)
The scientists guessed that the new seedlings1 were sensing the presence of neighboring plants by detecting the characteristic color of light reflected sideways from leaves of the neighboring plants. That characteristic color contains a very small amount of red light and a larger amount of what is known to botanists2 as far-red light. To test their guess, the scientists in effect blinded some new seedlings to that far-red light by placing clear blue cylinders3 around their stems. The accelerated growth was reduced or abolished. This striking result suggests that light scattered4 sideways from adjacent leaves provides an early signal of competition to young green plants. The young plants react to the signal by accelerating their stem growth to get a head start in the race for light.
收听单词发音
1
seedlings
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| n.刚出芽的幼苗( seedling的名词复数 ) | |
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2
botanists
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| n.植物学家,研究植物的人( botanist的名词复数 ) | |
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3
cylinders
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| n.圆筒( cylinder的名词复数 );圆柱;汽缸;(尤指用作容器的)圆筒状物 | |
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4
scattered
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| adj.分散的,稀疏的;散步的;疏疏落落的 | |
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