This problem seemed to be complex in the first instance, but it could be easily solved.

这个问题乍一看似乎很复杂，但其实很容易解决。

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This problem seemed to be complex in the first instance, but they could solve it easily.

这个问题初看起来复杂，但他们是能够轻易解决的。

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This extremely poisonous carbon compound happens to be very reactive, allowing it to lock in hugely complex but stable chains of other molecules.

这种剧毒的碳化合物碰巧是非常活泼的，这使得它能够锁定在非常复杂但是稳定的其他分子链中。

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In a brief statement from the White House, Mr.Obama stressed this will be a complex and challenging operation.

VOA: standard.2010.01.13

Botox is an injection of a molecule, or a complex molecule but a molecule, so in what ways would that be Biomedical Engineering?

肉毒杆菌素是一种注射用分子,或者说是一种复杂的分子,但它只是一种分子,它与生物医学工程有怎样的联系呢

耶鲁公开课 - 生物医学工程探索课程节选

At the same time, it's interesting that Deuteronomy seems to be aware of some of the dangers in this idea, the danger of a superiority complex, a moral danger involved in the notion of election.

同时，很有趣的是,《申命记》似乎意识到了这个观点的危险之处，优越性的危险，在“选择“这一概念中的道德危机。

耶鲁公开课 - 旧约导论课程节选

Tracing an attack to its original source can be complex in the extreme, he adds.

BBC: South Korea network attack 'a computer virus'

While the solution may be complex in its execution, it can be simply stated: Establish stable institutions to empower people to be free and productive and they will prosper.

FORBES: To Fix Income Inequality, The Have-Nots Must Become The Do-Somethings

Incentive stock options can provide substantial income to its holders, but the tax rules for their exercise and sale can be very complex in some cases.

FORBES: Introduction To Incentive Stock Options