- [uncountable, countable]
long, thin material used for tying things together, made of several threads that have been twisted together; a piece of string used to fasten or pull something or keep something in place 细绳；线；带子 
a piece/length/ball of string 一根/一段/一团线 He wrapped the package in brown paper and tied it with string. 他用棕色包装纸把包裹包好，又用细绳捆上。 The key is hanging on a string by the door. 钥匙拴在门边的带子上。
Extra ExamplesHe pulled the string tight. 他拉紧绳子。 I cut a length of string to tie up the package. 我剪下一段细绳来捆扎包裹。 There's a knot in the string. 绳上有个结。 Tie the string around the parcel. 把绳子系在包裹上。 He wound the string into a ball. 他把细绳缠成一团。
Oxford Collocations Dictionaryadjective- taut
- tight
- loose
- …
- bit
- length
- piece
- …
- tie
- tie something up with
- undo
- …
- vest
- in the string
- string of
- [countable]
a set or series of things that are joined together, for example on a string 一串 
- [countable] string of something
a series of things or people that come closely one after another 一系列；一连串；一批 The band had a string of hits in the nineties. 这个乐队在90年代获得了一连串的成功。 He owns a string of racing stables. 他有好多个赛马训练场。
Extra ExamplesThere's been a whole string of accidents at that corner. 那个角落发生了一连串的事故。 This is the latest in a string of scandals associated with the president. 这是与总统有关的一系列丑闻中的最新一起。 a tennis player with a long string of successes on grass courts 在草地球场上连续获得成功的网球运动员 After winning a string of elections, the party suddenly went into decline. 在赢得一系列选举后，该党突然走向衰落。 He had a whole string of broken relationships in his past. 他过去有一连串破裂的关系。 The treatment is available in a string of clinics across the country. 这种治疗在全国各地的一系列诊所都有。 The company owns a string of casinos in Nevada. 该公司在内华达拥有好多个赌场。
- [countable]
a series of characters (= letters, numbers, etc.) 字符串 to key in/enter a search string 键入/输入搜索字符串
- [countable]
a tightly stretched piece of wire, nylon, or catgut on a musical instrument, that produces a musical note when the instrument is played 弦 
Play it on the G string. 以 G 弦演奏。
Oxford Collocations Dictionaryadjective- open
- guitar
- violin
- …
- tune
- loosen
- tighten
- …
- break
- vibrate
- instrument
- on a/the string
- strings[plural]
the group of musical instruments in an orchestra that have strings, for example violins; the people who play them （管弦乐团的）弦乐器，弦乐器组 
- [countable]
any of the tightly stretched pieces of nylon or natural gut in a racket, used for hitting balls in tennis and some other sports 弦 - strings[plural]
special conditions or limits 特定条件（或限制）
for tying/fastening捆／系用
things joined串接物
series系列
computing计算机技术
musical instruments乐器
on tennis racket网球拍
conditions条件
Word OriginOld English streng (noun), of Germanic origin; related to German Strang, also to strong. The verb (dating from late Middle English) is first recorded in the senses ‘arrange in a row’ and ‘fit with a string’.
Idioms
(tied to) somebody’s apron strings
have another string/more strings to your bow
- (British English)
to have more than one skill or plan that you can use if you need to 还另有一手；有两手准备 The exhibition shows that he has other strings to his artistic bow. 展览表明他的艺术弓还有其他弦。
how long is a piece of string?
pull strings (for somebody)
(North American English also pull wires)
- (informal)
to use your influence in order to get an advantage for somebody 凭影响（为某人）谋利益；（为某人）活动，走后门
pull the strings
to control events or the actions of other people 幕后操纵；暗中控制