Because of the long chain molecular structure of rubber and the weak secondary force between molecules, the rubber material has a unique viscoelastic property, so it has a good effect.

橡胶的这种卷曲的长链分子结构及分子间存在的较弱的次级力，使得橡胶材料呈现出独特的黏弹性能，因而具有良好效果。

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The chengguan are a secondary security force employed to take pressure off the police by enforcing regulations, but are widely feared for their heavy-handedness.

作为二级保安力量，城管被雇用来分担警察执法压力，但他们粗劣的手段引发广泛担忧。

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NASDAQ, New York's other big stock exchange, has evolved from a secondary market dealing mainly in technology and start-up companies to a global force.

而纽约的另一个大型证券交易所纳斯达克(Nasdaq)也已经由一家主要从事科技与新兴企业股票交易的二版市场成长为一家全球性的交易所。

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But before it comes into force, lawmakers say a secondary bill to implement the changes will have to be drawn up.

BBC: Mexico Congress passes sweeping telecoms bill

Lord Lipsey said his proposal, which would require both Houses to vote on a piece of secondary legislation before the bill's proposals could come into force, was "a belt to go with Lord Best's braces".

BBC: Government defeated over free home care plans