《CPython Internals》學習第 13天，p232-p249 總結，總計 18 頁。

一、技術總結

無。

二、英語總結(生詞：1)

1.overhead

(1)overhead: over-("above") + head(“top part, uppermost section”)

overhead的字面意思是：above the head,后來演變成"represent things situated above or metaphorically referring to additional costs".

adv. above the head.

adj. operating, lying, or comming from above. 示例: This room needs overhead lighting(這個房間需要頂燈).

n(c/u). business expenses(such as rent, insurance, or heating)not chargeable to a particular of the work.

(2)overhead costs vs direct costs

direct costs(直接支出/直接開銷/直接成本)：Costs that can be directly traced to a specific product(Example: raw materials, labor costs).

overhead costs(間接支出/間接開銷/間接成本，同 indirect costs): Costs that can be not directly traced to a specific product but are necessary for general operations(Example: rent, insurance, heating)。

在計算機書籍里面，overhead 大多表示的也是“overhead costs”這個意思，會被籠統的翻譯成“開銷”。

Because the CPython interpreter process has a significant overhead, the Pool will consider each process in the pool a worker. If a worker has completed, it will be reused(《CPython Internals》第232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) Anthony Shaw，《CPython Internals》：https://book.douban.com/subject/35405785/

2. 英語

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

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

歡迎搜索及關注：編程人(a_codists)