If a diver ascends too quickly from a high-pressure underwater environment to a lower-pressure one, gases dissolved in blood and tissue expand and form bubbles.
Studies show that young people with higher-than-average blood pressure and their families have a history of high blood pressure are more likely than others to develop a severe form of the condition.
研究表明,血压高于平均水平的年轻人及其家族有高血压病史的人比其他人更有可能患上严重的高血压。
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But when scientists squeezed tiny samples of a metallic glass under highpressure, they got a surprise: the atoms lined up in a regular pattern to form a single crystal.