We'll leave some evenings free,that is,if it is all right with you.
如果你们愿意的话,我们想留几个晚上供你们自由支配。
If it is not a question of resting the body, then perhaps it is the brain that needs resting? This might be a plausible hypothesis were it not for two factors.
如果睡眠的功能不是在于使身体得到休息,那么也许是让大脑得以休息?若不是下面两点,这种假使似乎是有道理的。