The database can assign sequence Numbers to each node so that it knows the position of each node and can compare the document order of two nodes in constant time.

数据库可以为每个节点分配顺序号，这样就知道每个节点的位置，可以在常数时间内比较两个节点的文档顺序。

youdao

As precautionary health measures go, supplements are easy. Compare the two seconds required to swallow a pill with the constant vigilance necessary to exercise and eat right.

在采取预防保健时，与坚持锻炼和正确选择饮食相比，只需要保持必要的警惕，花两秒钟服用补充剂药物，这种方法显得容易多了。

youdao

Another thing to notice is that I use a constant for the URI to compare to.

另一件要注意的事是，我让URI与一个常量比较。

youdao

That has made it easier for the Qualifications and Curriculum Authority, a quango that tries to keep standards constant, to compare different papers.

ECONOMIST: Are competing exam boards driving down standards?

Volume there has remained constant--while electronic volume has exploded--making the exchange a perfect place to compare open-cry and electronic platforms.

FORBES: That Other Exchange

Volume there has remained constant--while electronic volume has exploded--making the exchange a perfect place to compare open cry and electronic platforms.

FORBES: That Other Exchange