替代方案对供应商构成了可靠的威胁，即使转换的能力受到限制。

Alternatives provide a credible threat to suppliers, even if the ability to switch is constrained.

youdao

NAT 仅转换在内部和外部网络之间被指定需要被转换的流量。

NAT only translates traffic which travel between the inside and outside network and is specified to be translated.

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在第三种情况下，几乎没有其他选择，但毫无困难地转换的能力造成了一种威胁，企业可以利用这种威胁与现有供应商谈判让步。

In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers.

youdao

Now never mind that our own experience with virgins has failed to afford us such a spectacle of bodily transformation.

没有关系，如果我们关于贞操的知识,之前未能告诉我们如此壮观的身体转换。

耶鲁公开课 - 弥尔顿课程节选

Listen to how quickly Yeats modulates from one feeling, one image, to another in these really very short, quick, three-beat lines.

听一听叶芝是怎么快速地,从一种情绪，一个情景中，转换到另一个里去的,就在这些三音韵的短诗句中。

耶鲁公开课 - 现代诗歌课程节选

So, if we look at what the other sub shells are called, essentially we're just converting the number to a letter.

我们来看看,另外的子壳层叫什么，本质上，我们就是把数字转换为，一个字母。

麻省理工公开课 - 化学原理课程节选