staple

staple1
noun
  1. a piece of bent metal or wire pushed through something or clipped over it as a fastening, in particular
    固定物体用的弯曲金属（或金属丝)，尤指
    ■a piece of thin wire with a long centre portion and two short end pieces which are driven by a stapler through sheets of paper to fasten them together
    订书钉；肘钉
    ■a small U-shaped metal bar with pointed ends for driving into wood to hold attachments such as electric wires, battens, or sheets of cloth in place
    U形钉
verb
  1. [withobj. and adverbial of place]attach or secure with a staple or staples
    用U形钉固定；用订书钉（或肘钉）钉
    Merrill stapled a batch of papers together.
    梅里尔用订书钉把一叠纸钉在一起。
语源
  1. Old English stapol, of Germanic origin; related to Dutch stapel 'pillar' (a sense reflected in English in early use)
staple2
noun
  1. a main or important element of something, especially of a diet
    主要（或重要）成分；主食
    bread, milk, and other staples.
    面包、牛奶和别的主食。
    Greek legend was the staple of classical tragedy.
    希腊传说是古典悲剧的主要组成部分。
    ■a main item of trade or production
    主要商品；主要产品
    rubber became the staple of the Malayan economy.
    橡胶成了马来人经济的主要产品。
  2. [mass noun]the fibre of cotton or wool considered with regard to its length and degree of fineness
    （棉花、羊毛的）纤维（与纤维的长度和精细度相关）
  3. [often with modifier](historical)a centre of trade, especially in a specified commodity
    (史)（特定商品的）贸易中心
    proposals were made for a wool staple at Pisa.
    建议在比萨建立一个羊毛交易中心。
adjective
  1. [attrib.]main or important, especially in terms of consumption
    （尤指消费方面）主要的，重要的
    the staple foods of the poor.
    穷人的主食。
    violence is the staple diet of the video generation.
    暴力是录像时代向观众灌输的主要东西。
    ■most important in terms of trade or production
    （贸易或生产方面）最重要的
    rice was the staple crop grown in most villages.
    在大多数的村庄里稻子是最重要的农作物。
语源
  1. Middle English (in sense 3): from Old French estaple 'market', from Middle Low German, Middle Dutch stapel 'pillar, emporium'; related to staple
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