| 释义 |
ra·di·us 英ˈreɪdiːəs美ˈrediəsAHDrāʹdē-əs
基本双解英英词源搭配记法近义反义句型派生词例句Thesaurus
n.半径范围³;半径⁸¹;桡骨¹⁵;辐射区¹
图形上的附属品尺寸数学数量
n.名词
C半径距离）(length of a straight line from the centre of a circle or sphere to any point on its circumference or surface C用半径度量的圆形面积；半径范围circular area measured by its radius
Noun:
the length of a line segment between the center and circumference of a circle or spherea straight line from the center to the perimeter of a circle or from the center to the surface of a spherea circular region whose area is indicated by the length of its radius;they located it within a radius of 2 miles the outer and slightly shorter of the two bones of the human forearmsupport consisting of a radial member of a wheel joining the hub to the rim词根词缀： -radi-射线,放射 + -us名词词尾
用作名词 n.
～+介词radiusof action活动半径；有效破坏半径the radiusof curvature曲率半径
钱博士radi放射，辐射+us拉丁语名词词尾，在此保留，可视为名词后缀→辐射之物，车轮的辐条⇒数学术语半径，半径范围；解剖学术语桡骨比较直，形如车轮的辐条，故此得名
词根radi-放射，辐射来自拉丁语，本意为车轮的辐条，引申为像辐条一样的放射状事物。radi放射，辐射+us拉丁语名词词尾，在此保留，可视为名词后缀→辐射之物，车轮的辐条⇒数学术语半径，半径范围；解剖学术语桡骨比较直，形如车轮的辐条，故此得名。GRE红宝书源于: radiatev 放射从圆心放射出去的线－radius
radi- 辐射, 雷达的辐射是从中心顺逆时针地沿半径扫非常记忆ra瑞〖谐音〗+diu丢〖拼音〗+s美女〖熟词〗⇒阿瑞甩丢了美女一个地球半径的距离词根记忆radi光线+us→半径就像是从一点发出N多光线，它们距离都相等→半径方振宇词汇奥秘比较记忆radius of action行动范围；有效距离词根记忆rad光线＋ius→半径就像是从同一点散发出的许多光线→半径联想记忆radiu看作radio，无线电＋s→无线电传播的范围→半径范围词根记忆radi光线+ us ⇒半径近义词 line线r字母rarea面积range范围scope机会reach到达sweep打扫remit汇出spoke轮辐circle圆圈length长度bounds界限umbrella伞breadth宽度extent 广度distance距离wheel spoke轮辐ambit权势等的范围…area of influence影响区域,影响面积…
用作名词n.We are measuring the radius of the circle.我们正在测量圆的半径。
He has visited every shop within a radius of two miles.周围两英里以内的店铺他都去过。Ptriradius指纹三角戈耳顿氏三角Pradiuses辐射光线径向射线半径半径范围界限范围桡骨
名词89%,形容词11%
用作名词Nobody is allowed to enter the operationradius.不允许任何人进入工作半径范围以内。
What is theradiusof this circle?这个圆的半径有多长?
We can compute the circular area withradius.我们能用半径计算出圆的面积。
Theradiusexpands markedly at its lower end.桡骨下端明显扩张。
The police searched all the woods within a six-mileradius.警察搜索了在周围六英里以内的树林各处。noun.range, sweep
同义词 ambit,boundary,compass,expanse,extension,extent,interval,limit,orbit,purview,reach,semidiameter,space,span,spoke
boundariesnoun outer limit
abuttals,ambits,barriers,beginnings,borderlands,borderlines,bordersboundsbrinks,circumferences,circumscriptions,compasses,confines,edges,ends,environs,extents,extremities,frames,fringes,frontiers,hems,horizons,limits,line of demarcations,lines,marches,margins,marks,meres,metes,outlines,outposts,pales,perimeters,peripheries,precincts,purlieuses,radii,rims,sides,skirts,terminals,terminations,termini,verges
boundarynoun outer limit
abuttals,ambit,barrier,beginning,border,borderland,borderline,bounds,brink,circumference,circumscription,compass,confines,edge,end,environs,extent,extremity,frame,fringe,frontier,hem,horizon,limits,line,line of demarcation,march,margin,mark,mere,mete,outline,outpost,pale,perimeter,periphery,precinct,purlieus,rim,side,skirt,terminal,termination,terminus,verge
compassnoun boundary, periphery
ambit,area,bound,circle,circuit,circumference,circumscription,confines,domain,enclosure,environs,expanse,extent,field,limit,limitation,orbit,perimeter,precinct,purlieus,purview,radius,range,reach,realm,restriction,round,scope,sphere,stretch,sweep,zone
confinesnoun boundaries
borders,bounds,circumference,compass,country,dimension,edge,end,environs,extent,limits,orbit,periphery,precinct,proportions,purlieus,purview,radius,range,reach,region,scope,sweep,term,terrain,territory
distancenoun interval, range
absence,ambit,amplitude,area,bit,breadth,compass,country mile,expanse,extension,extent,far piece,farness,gap,good ways,heavens,hinterland,horizon,lapse,length,objective,orbit,outpost,outskirts,provinces,purlieu,purview,radius,reach,remoteness,remove,scope,separation,size,sky,space,span,spread,stretch,sweep,way,width
expansenoun large space, usually open
amplitude,area,belt,breadth,compass,distance,domain,extension,extent,field,immensity,latitude,length,margin,orbit,plain,radius,range,reach,region,remoteness,room,scope,span,sphere,spread,stretch,sweep,territory,tract,uninterrupted space,width,wilderness |