So over millennia, we developed a reward system that causes us to seek and change our behavior so we can capture rewarding things to counterbalance the pain.

所以在这一千年中，我们发明了这项奖励制度，它能使我们寻找并且改变我们的行为以至于我们能够获得奖励的东西来平衡那些疼痛。

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“It has been really challenging to simulate atmospheric wind-pattern change over the Indian Ocean because the system is very, very complicated because of the land,” Han said.

“由于陆地形状的原因，整个系统变得非常，非常复杂，这让模拟印度洋上大气中的风向规律变化真的很有挑战性，”Han 称。

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"It has been really challenging to simulate atmospheric wind-pattern change over the Indian Ocean because the system is very, very complicated because of the land," han said.

“由于陆地形状的原因，整个系统变得非常，非常复杂，这让模拟印度洋上大气中的风向规律变化真的很有挑战性，”Han称。

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Eurozone partners are saying Cyprus has got to change its banking system, over-reliant on foreign depositors, and the money it needs has to come out of that system, one way or another, he adds.

BBC: Cyprus crisis: Pressure grows over bailout

Eurozone partners are saying Cyprus has got to change its banking system, which is over-reliant on foreign depositors, and the money it needs has to come out of that system, one way or another, he adds.

BBC: Cyprus MPs in key bailout talks

France's huge union-dominated education system, with 1m teachers in over 70, 000 schools, is stubbornly resistant to change.

ECONOMIST: France