optional是什麼意思_音標_用法_例句

簡單釋義：

adj. 可選擇的；選修的

n. 〈美〉選修科

網絡 非強制的；可選的；可以任選的

完整釋義：

adj.

1.可自由選擇的;隨意的,任意的;非強制的
2.可供選擇的
3.選修的
4.任選的
5.可自行決定的
6.非強制性的
7.備用的

n.

1.選擇性
2.自選動作
3.〔美國〕選修科
4.任意

例句：

1. The structure and validity of the MDMP must also be examined as the metric to which optional decision-making processes are compared.
   軍事決策程序MDMP的結構和有效性同樣要作為可選的決策程序相對比的衡量標準來檢驗。

2. They had a special offer for a Sony VAIO, which had a very nice large screen and space for an optional second battery.
   他們有一個SonyVAIO的特別提供，它有一個非常好的大螢幕以及額外的第二顆電池的空間。

3. After a join hint is specified, the INNER keyword is no longer optional and must be explicitly stated for an INNER JOIN to be performed.
   指定聯接提示後，要執行INNERJOIN時，INNER關鍵字不再為可選，而必須顯式說明。

4. That noted, it seems to me that optional tips are an attractive way of doing business.
   鑒於此，我覺得隨意小費制是個有吸引力的辦法。

5. "Moving three evictions , optional neighbouring states, " the importance of education has always been a traditional Chinese virtue.
   “孟母三遷，擇鄰而居”，重視教育一直是中國的一個傳統美德。

6. In fact, for one-to-one associations that are optional on both end, the code generated by the wizard is all we need.
   實際上，對於兩端都可選的一對一關聯，只需要嚮導生成的代碼就夠了。

7. sed takes a script of any number of commands followed by an optional input filespec; by default, it reads standard input.
   sed接受包含任何數量命令的腳本，後面跟着可選的指定輸入文件的選項；缺省情況下，它讀取標準輸入。

8. The terms included in DCMI are divided into a minimal set of base elements and an optional collection of refinements to these base elements.
   DCMI中的術語被劃分成最小化的基本元素集和對這些基本元素細化的可選集。