You need not have any understanding about it: a clear-cut rule is given and you follow it.

你不必对它有任何领悟：给出一种明文规定让你遵从。

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Water displacement curve is the most common method for water cut rule study, productive index prediction and recoverable reserve calibration. There are more than 50 methods of such a kind nowadays.

驱替特征曲线法是研究油田含水规律、预测开采指标和标定可采储量最常用的方法，目前已形成50多种。

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First, military budgets were cut after many Latin American nations turned their back on military rule in the 1980s.

第一，自上世纪80年代许多拉美国家摆脱军人统治后，军费有所削减。

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He did not rule out tax hikes to cut the deficit, once the U.S.economy is growing.

VOA: standard.2009.08.02

Mr Mitarai told The Economist recently that he has a rough cut-off rule for allocating investment: anything for which labour comprises more than 5% of production costs can be done in China or some other low-wage country.

ECONOMIST: Manufacturing in Japan

In December, he called for the pay of teachers who worked to rule to be cut if they were in breach of contract.

BBC: Teachers in England and Wales to strike

Last year, when the House Republicans were passing the cut, cap and balance rule, the White House called it an empty political statement.

WHITEHOUSE: Press Briefing