And existential means relating to human existence.

" existential " 指与人类存在有关的。

So far, though, we've not seen any sign of them.

然而迄今为止，我们并没有看到 任何有关它们存在的迹象。

That's a deep, an existential question. I don't believe we do.

个深刻，有关生死存在的问题，我不认为我们有样的权利。

Mrs. Clinton should have discussed the security risks with officials, the report said, though it recognized that the department had a history of dealing inadequately with electronic messages.

报告也表示，尽管国会也曾出过电子邮件使用不当的事件，但希拉里应该向相关官员咨询有关使用私人邮箱存在的安全隐患问题，但她并没有么做。

That's a chemical definition I Think what we experience is a particular thing that has to do with viscosity and the presence of hydrogen bonding, but it's still sticky in the chemistry way yeah, and also sticky in a tangible way.

个化学定义， 我认为我们所经历的与粘度和氢键的存在有关的特定现象，但在化学意义上仍然粘性的，同时在感官上也粘性的。

Credit Suisse has spent the last few days battling social media rumours that the bank is at risk of defaulting.

过去几天，瑞士信贷直在与社交媒体上有关该行存在违约风险的谣言作斗争。

They don't realize that their stories are all about a non-existent future.

他们没认识到他们的故事全都有关个并不存在的将来。

Although there may be reasons why hyperpigmentation in a given area could relate to skin cancers.

尽管某些区域内的色素沉着可能与皮肤癌有关，存在种关联的原因。