词典释义：
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But Einstein's equations also predict that if wormholes do form in nature, they may be subatomic in size and exist for only fractions of a second before closing off.
但爱因斯坦方程式也预言，如果虫洞自然形成，它们可能会是亚原子那么大，并且仅存在几分之一秒就会封闭。
《The Science of Interstellar》《《星际穿越》中的科学》
双语例句
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You're a great tutor, Jimmy. My son used to be hopeless at math. Now he's doing fractions like a boss!
Jimmy，你是个好家教。我儿子以前数学很差，而现在他做分数题可以说是秒杀各题！
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She taught me fractions and counting.
他教我分数和计算。
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The students had a grasp of decimals, percentages and fractions.
学生们掌握了小数、百分数和分数。
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He was so clever; he could reckon fractions in his head.
他是那么聪明；他能心算分数。
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You do fractions, then you do decimals.
你先学习分数，然后，学习小数。
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Mole fractions or ratio, but it's got units.
摩尔分数或比率，但它是有单位的。
近义词
反义词