The same dosage given to a woman can also raise her aggression level, but will not have the same degree of chemical effect as for a man.

如果把一定剂量的睾酮给一个女性，也能增加她的进攻性，但同等剂量对男人却不会有同样的化学效应。

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Research has uncovered more and more about the effect of chemical additives like BPA on female fertility and the health of the children.

很多研究已经越来越多地揭示了化学添加剂如BPA对女性生育能力和儿童健康的影响。

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The combination of unconditional laughter and yogic breathing is said to stretch muscles and trigger endorphins –the chemical in the brain known for its feel-good effect.

据说，无拘束的欢笑和瑜伽呼吸(方式）相结合能够舒缓肌肉，刺激一种脑内化学物质——内啡肽的产生，而这种物质能带产生使人感觉良好的效果。

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Researchers have spotted a never-before-seen chemical effect in Vincent Van Gogh's Flowers In A Blue Vase that is dulling the work's vibrant yellows.

BBC: Van Gogh's Flowers In A Blue Vase damage seen in X-rays

The knock-out effect of the chemical secreted in the honey-bee bite, known as 2-heptanone, was discovered as Dr Papachristoforou and colleagues observed bees dealing with pests.

BBC: Honey-bees found to have bite that stuns

But the strength of the greenhouse effect depends on the chemical composition of the atmosphere, because the phenomenon is due to the absorption of infra-red radiation by various gases in the air.

ECONOMIST: Climate change: Getting real | The