The answers depend largely on what your fitness level is, which trimester you're in and how you're feeling, Jeffreys says.

这些问题的答案在很大程度上取决于你的健身水平，这学期你和你的感觉如何，杰弗瑞斯说。

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Experts say the findings could lead to a simple new predictive test within several years. Here's our health correspondent Branwen Jeffreys.

专家称这个发现会在几年内促成一项简单的新预测试验，卫生记者Branwen Jeffreys报道。

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Now jeffreys points out that, if a number of observations have been found to conform to a law, it is highly probable that next one will do so whether the law is true or not.

现在杰佛利指出，如果已获得大量观察资料与一条法则一致，非常可能下一条法则也将如此，不管该法则正确与否。

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However, Stuart Jeffreys, a case worker from the Citizens Advice Bureau, said the proposal was vague.

BBC: Kent

After solving his first immigration dispute successfully the following year, Dr Jeffreys was bombarded with other inquiries.

ECONOMIST: CASE HISTORY: DNA's detective story | The

However, as DNA profiling ceases to be the sole province of the police, Prof Jeffreys said he has other concerns too.

BBC: DNA pioneer's 'eureka' moment