1.constant a．稳定的，不变的(invariable);n．常数，恒量(a number that is assumed not to change value in a given mathematical discussion)

词根记忆：con(始终)+stant(站，立)一始终站立一不变的

例:The cost would remain constant even if such treatments were instituted on a large scale.//In this equation, the constant equals the speed of light.

派生词：constancy(n，恒久不变)

2.constellation n.星座，星群(named group of stars)

词根记忆：con(共同)+stell(星星)+ation--在一起的一簇星星--星座，星群

例:The cooling-flow theory gained support when Fabian observed a cluster of galaxies in the constellation Perseus.

同根词：stellar(a.星的，恒星的)

3.constituent n.成分;要素(component; element)；选民(a member of a constituency)

例:The amino acid is one of the sweetener's principal constituents.

派生词：constituency(n.选民；支持者)

4.constitute v.组成，建立(to set up, establish)；制定(to enact)

词根记忆：con+stitute(建立，放)--建立，组成

例:What constitutes an American Indian rese~ation is a question of practice, not of legal definition.

派生词：constitution(n.宪法；构造)

5.constraint n.约束，抑制(restraint, limitation)

词根记忆：con(共同)+straint(拉紧)--拉紧到一起--约束

例:Western women were free from the constraints binding their eastern sisters.

6. constrict v.收缩；使狭窄(to make narrow or draw together)

例:When the seal dives below the surface of the water and stops breathing, arteries become constnbted.

派生词：constriction(n.压缩，收缩)；constrictive(a．压缩性的)

7.construct v.建筑，建造(to build)；构成(to make or form by combining or arranging parts or elements)

词根记忆：con(加强)+struct(建造)--建造

例:Male bowerbirds construct elaborately decorated nests, or bowers.

派生词：construction(n.建设;建筑物;结构)

同根词：restructure(v.调整;重建)

8.construction n．建筑，建筑物(the process, art, or manner of constructing sth.)；结构．

句法关系(syntactical arrangement)

词根记忆：con(共同)+struct(建造)+ion--共同建立--建筑

例:The construction of the cable car terminal at Machu Picchu will require the use of potentially damaging heavy machinery at the site.

同根词：destruction(n.破坏，毁灭)

9.constructivism n.结构主义，构成派(an art movement concerned with formal organization of planes and expression of volume in terms of modern industrial materials)

词根记忆：con(共同)+struct(建造)+iv+ism(主义)--结构主义

例:The modernization gave credence to the view of advocates of social constructivism.

同根词：construction(n．建筑)

10.constructivist n.构成主义者(an artist of the school of constructivism)

词根记忆：来自construct(v.构造，建造)

例:Clark refutes the extremes of the cortstructwists by both theoretical and empirical argument's.

同根词：constructivism(n.构成主义;构成派)