So they built a system of canals to bring water down from the mountains.

VOA: special.2009.06.04

Remember, because that 1 s orbital is all the way down in terms of if we're thinking about an energy diagram, we're all the way down here, so we have a huge amount of energy we have to put into the system in order to eject an electron.

还记得吧，因为1，s，轨道在能量示意图里,是在最底部的，我们要一直到最下面，所以我们要向这个系统注入非常大的能量,才能打出一个电子。

麻省理工公开课 - 化学原理课程节选

But they have really had a big scaling down of the mass transit system this year.

但是今年确实大幅度削减了公共交通。

纽约的公共交通 - SpeakingMax英语口语达人

It can refer to many things, ranging from a pious way of life to a system of corporal and capital punishment, laid down in Islamic law but practised in only a few places.

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What is likely to replace the current model is a new system of scaled down agencies.

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It would provide a refundable tax credit for the purchase of health care, but it would also set up a voucher system for the purchase of Medicare down the road.

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