This, along with very restrictive licensing, prevents them from being adopted within large enterprises, which limits their commercial use.

而且，由于非常严格的许可协议，阻止了他们在大企业中的采用，这限制了他们的商业使用。

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It can, and has, put limits or prohibitions on certain types of bank lending, for example, in commercial real estate.

这能够并且已经对特定类型的银行借贷实施限制或禁令，如在商业地产领域。

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Such messages are not always commercial per se, and some push the limits of what it means to be solicited.

这样的消息其本身并不总是具有商业性，而对于有些消息，很难说是我们所需要的。

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But even readers who love Facebook, or at least cannot imagine life without it, should see its stock market failure as a sign of the commercial limits of the Internet.

FORBES: What the Facebook IPO Debacle Doesn't Tell Us

Until five years ago Japan's commercial paper market was off limits to nonbank financial companies.

FORBES: The sun also rises

But the project was held back by the city authorities' reluctance to allow residential accommodation and by strict limits placed on commercial space.

ECONOMIST: Urban regeneration