Memory blocks can be reached in one of two ways -- if the user program holds a reference to that block in a root, or if there is a reference to that block held in another reachable block.

可以以两种方式之一访问内存块 ―― 或者用户程序在 根 (root)中有对这一内存块的引用，或者在另一个可到达的块中有对这个块的引用。

youdao

As a result, updating a column can result in an error when there is a reference to the row you are attempting to update.

因此，当存在对尝试更新的行的引用时，更新列可能导致错误。

youdao

There is a reference to Tom in my book.

我的书中有一次提到汤姆。

youdao

Well, there is a reference to the pain of the test itself, presumably the PSA (Prostate Specific Antigen) test.

FORBES: Head-In-The-Sand Medicine: To Test Or Not To Test

For example, there is a reference to the name Anath-yahu, who seems to have been a consort to Yahu (a variant of Yahweh).

FORBES: This Just in for Women's History Month: God Had a Wife

In one of the e-mail messages released by the committee, there is a reference to a request by Lewis as to whether he could use as a defense the government forcing the deal to close to preserve systemic soundness.

FORBES: Bailout Nation