Pitcher plants use yet another strategy, growing long tube-shaped leavesto imprison their prey.
猪笼草使用了另一种策略，它们长出长长的管状叶子来囚禁猎物。
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It sounds paradoxical, because the idea behind this hypothesis is that the red pigment is made in autumn leavesto protect chlorophyll, the light-absorbing chemical, from too much light.