gravityn.重力；庄重；严重；严肃
gravitatev.受吸引；下沉；重力吸引，受重力作用；移动，移向
gravitationaladj.重力的；引力作用的
gravitation law引力定律
gravitation tank重力罐,供料罐,供料储槽
gravitation mass引力质量
Gravitation pure重力纯度
gravitation shock重力性休克
"the more remote the body the less the gravity"
"the gravitation between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them"
"gravitation cannot be held responsible for people falling in love"
"irrigation by gravitation rather than by pumps"
"the gravitation of the middle class to the suburbs"
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