extract
美[ɪkˈstrækt] n.汁；摘录；提炼物；浓缩物
网络提取物；取出；拔牙；浸膏
1 . A dentist may decide to extract the tooth to prevent recurrent trouble.
牙医可能会决定拔掉那颗牙，以免反复发作。
来自柯林斯例句
2 . This type of surgery could even be used to extract cancerous growths.
这种外科手术甚至可以用来切除癌性肿瘤。
来自柯林斯例句
3 . Blend in the lemon extract, lemon peel and walnuts.
调入柠檬汁、柠檬皮和核桃。
来自柯林斯例句
4 . They were performing a short extract from Shakespeare'sTwo Gentlemen of Verona.
他们正表演莎士比亚剧作《维洛那二绅士》中的一个片段。
来自柯林斯例句
5 . The following extract is taken from her new novel.
下面一段摘自她的新小说。
来自《权威词典》
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
定义和用法 PHP extract() 函数从数组中把变量导入到当前的符号表中。 对于数组中的每个元素，键名用于变量名，键值用于变量值。 第二个参数 type 用于指定当某个变量已经存在，而数组中又有同名元素时，extract() 函数如何对待这样的冲突。 本函数返回成功设置的变量数目。 语法 例子 1输出： 例子 2 使用全部参数： 输出：