...The process, as might be anticipated, operates upon thebowels; but I have never found it to do so with any dangerous power; onthe contrary, the laxative effect is generally in these cases beneficial... 
Dinks, Mayhew, and Hutchinson 「The Dog」
...New grass also operates medicinally upon thesystem...
Robert Jennings 「Sheep, Swine, and Poultry」
...She operates under my lens, she operates just beside my forceps...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The dry quick operates with surety, and its use is simple andeasy, producing an impression much like Wolcott’s...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
... duringwhich it operates...
George C. Comstock 「A Text-Book of Astronomy」
...A strip of paper is carried over these wheels andmoved forward by the same electro-magnet, which operates the printinghammers...
Wm. Gaertner & Co. 「Astronomical Instruments and Accessories」
...The First Cause is a physicalsubstance, some material thing, which operates by the laws of its ownnature...
Dr. D.M. Brooks 「The Necessity of Atheism」
...This boon,however, in some instances, operates unfairly...
John Lort Stokes 「Discoveries in Australia, Volume 2」
ランダム例文：
scanty recollection evaluations
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