Why do these limitations exist?

为什么会有这些限制呢？

youdao

This is exactly why the mapping BPMN to BPEL is hard and has so many limitations.

这也是BPMN与BPEL难以映射，以及局限性如此之多的原因。

youdao

That's why it might be hard for an 18 year old to choose their career, but it's a damn sight harder for someone in midlife when limitations have been learnt.

正因如此，对18岁的年轻人来说选择职业不是易事，而对那些已经了解到自己局限的中年人，就难上加难了。

youdao

Why are 10th Amendment limitations upon enumerated federal powers over states routinely ignored?

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However, as good as 802.11n is, few if any unlicensed wireless technologies are completely immune to interference and range limitations, which is why the inclusion of a hard drive is a great boon for this device class.

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