Heart rates around 55-60% of your maximum heart rate (220-(your age)=maximum heart rate) for a period of at least 30min is optimal for just burning fat.

心脏跳动幅度在你最大心率（最大心率 =220- 你的年龄）的 55% 到 60% 之间持续 30 分钟的时候，是燃烧脂肪的最佳时期。

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Electric kettle, after a period of time without burning out of the water there is rust taste, how to remove?

电热水壶，经过一段时间，不再烧出的水有铁锈的味道，如何删除？

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After a period of burning helium and shrinking and expanding and then finally shrinking again, the Sun will wind up as tiny cinder known as a White Dwarf, fading away for the rest of time.

经过氦燃烧、收缩、膨胀然后最终再收缩，太阳将会变成一个小残骸，也就是众所周知的白色矮星，从而永久消失。

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Ornate interiors characterized by gilding, elaborate wood-burning fireplaces, towering ceilings, and period-style French furnishings add to the grand ambiance.

FORBES: Mansions And Castles You Can Get Married In

Continuing to chew after the warm-up period seems to have required too much jaw-work, and burning more energy negated the benefits.

FORBES: Chew Yourself a Better Brain