在什么情况下一些活动的结合会做得更好？

Under what circumstances does some combination of activities work best?

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人(背景，右)与禽(背景，左)流感病毒结合会导致更为严重的症状。

Human (background, right) and bird (background, left) flu viruses combine to make worse symptoms.

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火星和金星都在白羊座，这是个理想状态，两者的结合会点燃爱的火花。

Mars and Venus, both in Aries, is an ideal situation, for when together these two can truly spark the stirrings of love.

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So iron left to own devices in the atmosphere in the presence of a little bit of water, with the water form iron oxide.

铁在大气中，在存在,少量水的条件下，大气会开始与水结合产生氧化铁。

麻省理工公开课 - 热力学与动力学课程节选

And, if the conditions are right, they will combine, fuse and form darmstadtium plus neutron.

如果条件是正确的，它们将会结合，融合并形成鐽中子。

麻省理工公开课 - 固态化学导论课程节选

Because if it was a neurotransmitter activated ion channel, what would happen when the neurotransmitter bound here?

因为假如这是一个,神经递质激活的离子通道,当神经递质结合于此的时候,会发生些什么呢

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