"Michael has a thigh muscle injury and will be out for six weeks or so," said a spokesman.
“迈克尔以为大腿肌肉拉伤将会有大约六个星期不能上场,”发言人说。
Scientist liken voluntary or directed attention to a mental muscle that can wear out over time.
科学家把有意识注意力必做一块脑部肌肉,随着时间的流逝,它会一点点失去力气。
But the electrolyte can evaporate, causing the muscle to dry out when exposed to the air.
但是电解液会挥发,因此当这种肌肉暴露在空气中时就会干涸。
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