它们经常毫无理由地被破坏，决不会有其它用途，亦或被赋予生长的机会，肝细胞研究会把我们引入恐怖科幻故事时常发生的年代-克隆人时代吗？

Would research of stem cells usher in an era often shown in future science fiction morality tales of horror, a world of human clones?

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但如何减少、防止制品成形中时常发生的翘曲现象，是经常困扰工程师的一大难题。

But it is a great perplexing problem to reduce and prevent the warping phenomenon during injection molding.

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