...The oil bubble ()at the upper end is their float; the swimming bells immediately below it(), by the convulsive contractions of which they move along, aretheir oars... 
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...They habitually tremble much; and their necks have an extraordinary, apparently convulsive, backward and forward movement...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Theanimal's frame is shaken by convulsive spasms, each throe being announcedby a deep pectoral sound, and only after this has repeatedly been heardis the stomach able to cast off its contents...
Dinks, Mayhew, and Hutchinson 「The Dog」
...They are of various kinds—fainting fits, delirious fits, and convulsive fits...
Gordon Stables 「The Domestic Cat」
...There wasone convulsive twist, and the gay-coloured fins lay still, the silverand vermilion body hung limp from the captor's jaws...
Charles G. D. Roberts 「The Watchers of the Trails」
...Three times in his convulsive leaps themouse succeeded in touching the snake's body,—but with his feet only,never once with those destructive little teeth...
Charles G. D. Roberts 「The Watchers of the Trails」
...Therewas a convulsive heave as the lungsdrew in a first long breath, and, withthat, an astonished and very much aliverodent scrambled to its feet, blinkingwondering eyes in the dazzling light...
Various 「Astounding Stories of Super-Science February 1930」
...Hefelt the wild convulsive struggles of Lanier against the thing; andthen suddenly the tunnel ended, debouched into a far-stretching,low-ceilinged cavity...
Various 「Astounding Stories, April, 1931」
...Now and then a convulsive ripple ran through its surface tissue andgreat ridges of flesh stood out...
Various 「Astounding Stories of Super-Science September 1930」
...The monstershuddered in a convulsive heap on the ground...
Various 「Astounding Stories of Super-Science September 1930」
...At length their convulsive movementsbrought the men close to the lantern,and the next instant the cellar wasplunged in darkness...
Various 「Astounding Stories of Super-Science, March 1930」
...He threw himself over with a convulsive jerk and flattened the palms ofhis hands in a breaststroke, while he kicked with his feet against thedense atmosphere about him...
Charles Willard Diffin 「The Finding of Haldgren」
...At the ageof four it was noticed that the child had signs of convulsive seizureswhich later commentators thought were of an epileptic nature...
Dr. D.M. Brooks 「The Necessity of Atheism」
ランダム例文：
perversity suppression Metcalf
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