adj.（食物，商品等）必要的；adj.重要的，主要的,
Merriam-Webster Online Dictionary
staple (noun) a usually U-shaped fastener as
a) a metal loop both ends of which are driven into a surface to hold the hook, hasp, or bolt of a lock, secure a rope, or fix a wire in place
b) a small wire both ends of which are driven through layers of thin and easily penetrable material (as paper) and usually clinched to hold the layers together
c) a usually metal surgical fastener used to hold layers of tissue together (as in the closure of an incision)
transitive verb
to provide with or secure by - staples
1.
a town used as a center for the sale or exportation of commodities in bulk
2.
a place of supply - source
3.
a chief commodity or production of a place
4.
a) a commodity for which the demand is constant
b) something having widespread and constant use or appeal
c) the sustaining or principal element - substance
5.
- raw material
6.
a) textile fiber (as wool and rayon) of relatively short length that when spun and twisted forms a yarn rather than a filament
b) the length of a piece of such textile fiber
1.
used, needed, or enjoyed constantly usually by many individuals
2.
produced regularly or in large quantities - staple crops such as wheat and rice
3.
- principal chief
Merriam-Webster Online Thesaurus
staple (noun)the main or greater part of something as distinguished from its subordinate parts
SYNONYMS:
brunt, bulk, chief, core, generality, heft, main, mass, staple, weightRELATED WORDS:
majority; aggregate, amount, entirety, quantum, sum, sum total, total, totality, whole; bottom, essence, essentiality, marrow, meat, nature, pith, quintessence, root, soul, stuff, substance; center, heart, hub, kernel, middle, nucleus, nut, seat; affair, argument, burden, crux, focus, gist, nub, pitch, point, purport; matter, motif, subject, text, theme, topicNEAR ANTONYMS:
accessory ( accessary), adjunct, appendage, extension, offshoot; component, constituent, element, ingredient; division, part, piece, section, segment; angle, aspect, facet, feature, quality, side