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单词 subtend
释义 sub·tend
\|səb|tend, _səbˈt-\ transitive verb
(-ed/-ing/-s)
Etymology: Latin subtendere to stretch beneath, from sub- + tendere to stretch — more at thin
1.
 a. : to be opposite to and extend from one side to the other of
  < a hypotenuse subtends a right angle >
 b. : to fix the angular extent of with respect to a fixed point or object taken as the vertex
  < the angle subtended at the eye by an object of given width and a fixed distance away >
  < a central angle subtended by an arc >
 c. : to determine the measure of by marking off the endpoints or boundary of
  < a chord subtends an arc >
  < a coral atoll, circular in form, subtended a shallow lagoon — J.A.Michener >
2.
 a. : to underlie so as to include
  < lesser loyalties which this supreme loyalty subtends — C.C.Morrison >
 b. : to occupy an adjacent and usually lower position to and often so as to embrace or enclose
  < a bract subtending a flower >
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更新时间:2025/1/27 21:47:59