对陨石球粒质地的研究证实，它们的冷却速度相当快，短则几分钟，长则数小时，因此形成陨石球粒的高温活动肯定是局部的。
Study of the textures of chondrules confirms that they cooled rather quickly, in times measured in minutes or hours, so the heating events that formed them must have been localized.
对于非固定步数的长任务，可以使用这种模式。
You use this mode for long tasks with no fixed number of steps.
也许你和许多人一样，为了延缓年龄渐长引起的认知能力衰退，时常进行“脑力锻炼”，比如玩数独游戏。
Maybe you are among the many people who do "brain exercises" like sudoku to slow the cognitive decline associated with aging.
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