美[?k?str?kt] 1 . A dentist may decide to extract the tooth to prevent recurrent trouble.
牙醫(yī)可能會決定拔掉那顆牙，以免反復(fù)發(fā)作。
來自柯林斯例句
2 . This type of surgery could even be used to extract cancerous growths.
這種外科手術(shù)甚至可以用來切除癌性腫瘤。
來自柯林斯例句
3 . Blend in the lemon extract, lemon peel and walnuts.
調(diào)入檸檬汁、檸檬皮和核桃。
來自柯林斯例句
4 . They were performing a short extract from Shakespeare'sTwo Gentlemen of Verona.
他們正表演莎士比亞劇作《維洛那二紳士》中的一個(gè)片段。
來自柯林斯例句
5 . The following extract is taken from her new novel.
下面一段摘自她的新小說。
來自《權(quán)威詞典》
1.a solution obtained by steeping or soaking a substance (usually in water)
2.a passage selected from a larger work;
he presented excerpts from William James' philosophical writings
1.draw or pull out, usually with some force or effort; also used in an abstract sense;
pull weeds
2.get despite difficulties or obstacles;
I extracted a promise from the Dean for two ne positions
3.deduce (a principle) or construe (a meaning);
We drew out some interesting linguistic data from the native informant
4.extract by the process of distillation;
distill the essence of this compound
5.separate (a metal) from an ore
6.obtain from a substance, as by mechanical action;
Italians express coffee rather than filter it
7.take out of a literary work in order to cite or copy
8.calculate the root of a number
定義和用法 PHP extract() 函數(shù)從數(shù)組中把變量導(dǎo)入到當(dāng)前的符號表中。 對于數(shù)組中的每個(gè)元素，鍵名用于變量名，鍵值用于變量值。 第二個(gè)參數(shù) type 用于指定當(dāng)某個(gè)變量已經(jīng)存在，而數(shù)組中又有同名元素時(shí)，extract() 函數(shù)如何對待這樣的沖突。 本函數(shù)返回成功設(shè)置的變量數(shù)目。 語法 例子 1輸出： 例子 2 使用全部參數(shù)： 輸出：
