The experiments to verify the limit cutting depth show that the cutting efficiency of machine tool can be improved by cutting at the spindle speed corresponding to the stable cutting point.

极限切深试验表明，以稳定切削点所对应的主轴转速进行切削可以提高机床的切削效率。

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In 2008, MPs voted on cutting the limit for the first time since 1990.

BBC: Q&A: Abortion law

For the Conservatives, Alex Johnstone said "a case may exist" for cutting the limit to deal with the "scourge" of drink-driving, but argued the focus of the police may change as a result.

BBC: Scottish drink-drive limit cut endorsed by MSPs

One basic rule for limit-making is that the burden of proof should fall on those who want change especially since the changers often want to keep on changing indefinitely: cutting the abortion limit by a fortnight was, for some, merely an interim goal on the way to a tighter squeeze or an outright ban.

ECONOMIST: Bagehot