-
a small thin piece of steel that you use for sewing, with a point at one end and a hole for the thread at the other 针；缝衣针 
a needle and thread 针线 the eye (= hole) of a needle 针眼 Can you thread this needle? 你能穿针吗？ a packet of small needles 一包小针
Extra ExamplesShe sewed it on with needle and thread. 她用针线把它缝好了。 The needle went in easily. 针轻易地扎了进去。 Thread the needle with a different coloured silk. 用不同颜色的丝绸把针穿起来。
Oxford Collocations Dictionaryadjective- long
- blunt
- sharp
- …
- use
- thread
- prick somebody/something
- the eye of a needle
- needle and thread
- a needle in a haystack
- …
- (also knitting needle)
a long thin piece of plastic or metal with a point at one end that you use for knitting. You usually use two together. 编织针 
Vera's knitting needles clicked away. 薇拉的织针发出咔嗒声。 a circular needle 圆形针 a needle holding two stitches 穿两根线的针
Oxford Collocations Dictionaryadjective- long
- blunt
- sharp
- …
- use
- thread
- prick somebody/something
- the eye of a needle
- needle and thread
- a needle in a haystack
- …
-
a very thin, pointed piece of steel used on the end of a syringe for putting a drug into somebody’s body, or for taking blood out of it 注射针；针头 a hypodermic needle 皮下注射器针头 a needle inserted into the abdomen 插入腹部的针 Using dirty needles was a significant factor in the spread of the disease. 使用肮脏的针头是疾病传播的一个重要因素。
Extra ExamplesTopics Medicineb1He believes that needle exchange schemes encourage drug addiction. 他认为针头以旧换新计划会助长吸毒。 He saw her stick a needle into her arm. 他看到她把针扎进自己的胳膊。 She winced when she felt the needle pierce her skin. 感到针扎进自己的皮肤时，她脸上露出痛苦的表情。 needle exchange programs 针头以旧换新计划 the dangers of sharing needles 共用针头的危险 A long needle is used to take a sample of the tumour. 一根长针被用来采集肿瘤样本。
Oxford Collocations Dictionaryadjective- hypodermic
- syringe
- injection
- …
- inject
- insert
- jab (somebody with)
- …
- go in
- pierce something
- tip
- exchange
- biopsy
- …
- the prick of a needle
-
a thin piece of metal on a scientific instrument that moves to point to the correct measurement or direction 指针 Extra ExamplesThe needle moved away from the wind. 指针背离风向偏转。 Wait until the needle settles and is pointing in one direction. 等到指针停在一个方向不动为止。
Oxford Collocations Dictionaryadjective- magnetic
- compass
- move
- point
- the needle of a compass
- [usually plural]
the thin, hard, pointed leaf of a pine tree 针叶；松针 
A soft blanket of pine needles covered the forest floor. 柔软的松针毯覆盖着森林的地面。
Oxford Collocations Dictionaryadjective- conifer
- pine
- drop
- lose
the very small pointed piece of metal that touches a record that is being played in order to produce the sound 唱针；磁针 She lowered the needle onto the record. 她把针放在唱片上。 The gramophone needle stuck in a groove. 留声机的唱针卡在凹槽里了。
for sewing缝纫
for knitting编织
for drugs药品
on instrument仪器
on pine tree松树
on record player唱机
Word OriginOld English nǣdl, of Germanic origin; related to Dutch naald and German Nadel, from an Indo-European root shared by Latin nere ‘to spin’ and Greek nēma ‘thread’.
Idioms
be on pins and needles (North American English)
(also (be) on tenterhooks British and North American English)
(to be) very anxious or excited while you are waiting to find out something or see what will happen 坐立不安；如坐针毡 I've been on pins and needles all week waiting for the results. 我整个星期都如坐针毡地等待结果。
a needle in a haystack