但其实，用户没必要长时间悬空手臂使用 Mac，只是在一些特定的场景，使用手指直接点击、拖动，真的会比触控板更方便直观，也更符合现代人的习惯。
The company also has a smart alarm that avoids alerting users to a low battery during the night, when they are likely to be asleep, since this often results in people disconnecting their alarm and forgetting about it.
。Line官方版本下载是该领域的重要参考
SelectWhat's included
习题链接：LeetCode 901. 股票价格跨度