它告诉我们是几月几号，却不告诉我们现在是几点钟！
It tells the day of the month, and doesn't tell what o'clock it is!
他不知道现在是几点钟，而且也不能肯定德思礼一家是不是睡了。
He didn't know what time it was and he couldn't be sure the Dursleys were asleep yet.
手表定理是指一个人有一只表时，可以知道现在是几点钟，而当他同时拥有两只表时却无法确定。
Watch Theorem is that a person has a table, you can know it is a few minutes, and when he has two tables not being able to determine.
手表定理是指一个人有一只表时，可以知道现在是几点钟，而当他同时拥有两只表时却无法确定。
Watch Theorem is that a person has a table, you can know it is a few minutes, and when he has two tables not being able to determine.
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