This is a complex issue and we need to take it seriously.

这是一个复杂的问题，我们需要认真对待。

youdao

It's a complex issue, and I should leave it having said this much, at least for the moment.

这是一个复杂的问题，我应该先说这么多，至少暂时这样。

youdao

Migration is a complex issue, and biologists define it differently, depending in part on what sorts of animals they study.

迁徙是一个复杂的问题，生物学家对此有不同的定义，定义的方法部分取决于他们研究的动物种类。

youdao

That sounds simple. But the issue is a complex mix of technical,business, political and legal questions.

VOA: special.2009.09.25

So it's a complex issue, and I should leave it having said this much, at least for the moment.

因此它是一个很复杂的问题，而我就讲到这里，至少暂时这样。

耶鲁公开课 - 文学理论导论课程节选

We can already use that in terms of single ions to think about a really complex biological issue, which is to talk about ion channels.

我们已经能够仅仅凭借这个关于单个离子的原理,来讨论一个非常复杂的生物问题了，我们要讨论的就是离子通道。

麻省理工公开课 - 化学原理课程节选

And it is a complex issue, indeed, as I will discuss in my next eBook post.

FORBES: eBook Evolutions: Publishers

But as you know, this is a complex issue and that requires complex solutions.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

We know this is a complex issue that stirs deeply held passions and political divides.

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