然而，科学研究已经无数次证明人工合成的食品类物质对人类是有害的，这也是为什么我们现在都趋向食用有机食品，对化学物质和添加物避之唯恐不及。

However, science has proven that artificially composed food-stuff is extremely harmful to humans, which is why we are all going organic, barring chemicals and additives.

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趋向化学刺激物的运动。

A general tendency, movement, or course.

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