这意味着供应链比以前更长、更复杂。

That means supply lines are longer and far more complex than in the past.

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但弯板链比直板滚子链的结构复杂，使得弯板链的链板数值计算和数值模拟比较困难。

The construction of offset drive chain is complicated in comparison with the ordinary roller chain. So it is difficulty to make the numerical calculation and numerical simulation.

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美国加州大学欧文分校的科学家马库斯•里贝在自己新撰写的文章中介绍说，这种酶可以被进一步修改，届时能转化出比丙烷更长的碳链。

Markus Ribbe, a scientist at the University of California-Irvine, says in a new paper that the enzyme could be further tweaked to make longer carbon chains than those that make up propane.

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Now the nice thing about this is that the degradation mechanisms seem to persist for some period of time, beyond the time at which you deliver the double stranded RNA; whereas, obviously, this mechanism here is only going to exist for as long as the anti-sense sequence is present.

而好消息是降解过程会持续一段时间,比你转入双链RNA的时间要长,但是,这种机制只会在,有反义链的时候发挥作用

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