"It's getting late, you should go to bed early" 这句话的意思是 "很晚了哦，早点休息"。其中 "it's getting late" 表示 "很晚了"，"you should go to bed early" 表示 "你应该早点休息"。
这句话的来源可能源自于日常生活对时间的描述，人们在谈论睡觉时常常会用到 "late" 和 "early" 这两个词。
例句：
It's getting late, you should go to bed early. (很晚了，你应该早点休息。)
It's late, you should turn in for the night. (很晚了，你应该睡觉了。)
You should go to bed, it's getting late. (你应该睡觉了，很晚了。)