那是一块被劈开的大木板。

It was a big cleft wood.

youdao

你明白从耳朵到耳朵把喉咙劈开的感觉么？

Do you know what it feels like to have your throat slashed from ear to ear?

youdao

粗糙的地板，是用手工劈开的木头铺成的。

The rough floor was made of wood, split by hand. (1)

youdao

And if you just look at the numbers, you can see how it cuts in from one side and then the other side as it keeps narrowing that range until it gets down to the place where there are at most two things left, and then it just has to check those two to say whether it's there or not.

你能看到他是如何不断的，从一个大的范围被拦腰劈开,知道最终只剩下两个数字,然后就只需要,比一比就知道结果了,将它同线性查找比较下。

麻省理工公开课 - 计算机科学及编程导论课程节选