"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"
The moon..kept in her orbit by gravitation to the earth.
出自： D. Brewster