While they are not widely used in application code, there's no reason you can't use them too.

虽然它们没有在应用程序代码中得到广泛使用，但是也没有不能使用它们的理由。

youdao

Leslie Chapman Henderson says even the building codes or laws that do exist, are not widely used or enforced.

莱斯利·查普曼·亨德森说，尽管存在建筑标准和法律，但并未广泛使用或执行。

youdao

SGML is designed to be "all things to all people", but in doing so it is too complex and therefore not widely used.

SGML的设计是“全民所有”的东西，但这样做太复杂，因此没有被广泛使用。

youdao

But technology expert Rob Atkinson says smartphones will most likely not be widely used in many developing nations because of their cost, and the cost of connected on-line data plans.

VOA: standard.2010.06.25

But ketamine is not widely used and has not always found to be helpful for all types of pain.

CNN: Is it safe to use ketamine as a pain drug?

However, they are not widely used simply because they are not widely known.

FORBES: How To Cut State Death Taxes -- Without Moving

It's understood that the SDLP will also propose selling off small forests across Northern Ireland which are not widely used by the public.

BBC: Party 'finds ?400m for economy'