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The fatty acids have no chirality ; their mirror image is the same molecule .

脂肪酸没有手性；它们的镜像分子就是自己。

The chirality or handedness of many biological molecules plays an important role in their function .

手性（或手征）在许多生物分子的功能中起着重要的作用。

However , it 's also possible that chirality can emerge in much simpler systems that don 't involve complicated chemical reactions .

但是，也有可能手性产生于不包括复杂化学反应的简单系统。

A new metamaterial with a handendness , or " chirality " , that can be switched on demand was created by an international team of physicists .

一种带有手型性，或称“手性”且可以按需求转变手性的新型材料已由一个国际物理学家团队发明出来。