only by appropriately timed cues
问题描述：
only by appropriately timed cues
Your body adjusts quickly to different sleep schedules.
Most people can reset their biological clock,but only by appropriately timed cues—and even then,by one–two hours per day at best.Consequently,it can take more than a week to adjust after traveling across several time zones or switching to the night shift.
这段话中的” only by appropriately timed cues—and even then,by one–two hours per day at best.
答
大部分人可以重新调整身体的生物钟,但是必须通过适当的定时提醒实现——而且即使是做到这点每天最好只调整1-2个小时.