《Operating System Concepts》學習第 47 天，p545-p551 總結，總計 7 頁。

一、技術總結

1.link

(1)定義

In file naming, a file that has no contents but rather points to another file.

(2)hard link

File-system links in which a file has two or more names pointing to the same inode.

二、英語總結(生詞：2)

1.acyclic

(1)acyclic: a-("not") + cylic(參考 cycle)

adj. involve a cycle(環狀的)。

(2)示例

An acyclic graph—that is, a graph with no cycles—allows directories to share subdirectories and files(《Operating System Concepts》第 547 頁)。

2.resolve

(1)resolve: re-("again") + solvere("to loosen, untie, release")

vt. resolve literally means "to loosen or release sth back to its original state", over time, it envolves to mean "to find a solution(untie a problem，解決)"。

(2)resolve vs solve

暫沒看到比較明顯的區分。下面是本人認為相而言還說的過去的一個對比：

solve, resolve, unfold, unravel, decipher can all mean to make clear or apparent or intelligible what is obscure or mysterious or incomprehensible. Solve is the most general in meaning and suggestion in this group; it implies the finding of a satisfactory answer or solution, usually to something of at least moderate difficulty {the mystery and disquieting meaninglessness of existence ... were solved for me now—L. P. Smith} {create a difficulty rather than solve one—A. M. Young} Resolve [...], as contrasted with solve, is likely to indicate analytic arrangement and consideration of the various phases or items of a problem or situation rather than finding a final solution or answer and is likely to suggest dispelling of confusion or perplexity by a clear formulation of questions or issues {you may find it of some interest to be told that the law has had to struggle with these problems and to know how it has resolved them—[Benjamin] Cardozo} In some situations this process may achieve an answer, especially a ready or summary one {he was at the same time resolving successive tangles of intrigue against himself and his policy—[Hilaire] Belloc} {it was realized that the method of resolving apparent contradictions by liquidating one of the contradictories is not the way to arrive at true solutions—Times Lit[erary] Sup[plement]}

(3)示例

To resolve differences like this, many RPC systems define a machine-independent representation of data(《Operating System Concepts》第 548 頁)。

If the directory entry is marked as a link, then the name of the real file is included in the link information. We resolve the link by using that path name to locate the real file(《Operating System Concepts》第 548 頁)。

關于英語的注解同步更新匯總到 https://github.com/codists/English-In-CS-Books 倉庫。

三、其它

今天沒有什么想說的。

四、參考資料

1. 編程

(1) Abraham Silberschatz，Peter Baer Galvin，Greg Gagne《Operating System Concepts》：https://book.douban.com/subject/30272539/

2. 英語

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

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