You will thus checks the law of magnets: like poles repel; Unlike poles attract.

这样你就可以验证磁体的定律：同极相斥，异极相吸。

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China has constantly strengthened checks on the enforcement of environmental legislation, and improved administrative law enforcement.

中国不断加强环境执法检查和行政执法。

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Article 62 of the executive can licensee production of products in accordance with the law sampling, inspection, testing, production and operation of their premises to carry out spot checks.

第六十二条行政机关可以对被许可人生产经营的产品依法进行抽样检查、检验、检测，对其生产经营场所依法进行实地检查。

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As a consequence of background checks, law enforcement has been able to stop people who have been convicted of murder from getting a gun, people who are under restraining orders for having committed violent domestic abuse from getting a gun.

WHITEHOUSE: President Obama Speaks on Reducing Gun Violence

We're not supporting more background checks of law-abiding citizens.

CNN: Gun debate: Where is the middle ground?

What the proportion is, is hard to say, but I think you break it down to issues of law enforcement, issues of -- and then law enforcement can mean not just gun legislation, but other issues of law enforcement, obviously, like background checks and the like.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,