... inthis dark and laborious life... 
Various 「Mother Earth, Vol. 1 No. 3, May 1906」
...This is a most laborious operation, as the sticks are large and the bird’sflight is feeble...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...But whether in ancient times selection was methodically pursued we may well doubt, when we hear how laborious the work was found by Le Couteur...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...If no relief be now sought, and the disease spreads, thebreathing grows quick at first, and then laborious...
Dinks, Mayhew, and Hutchinson 「The Dog」
...From the richest he takes their superfluous wealth to distribute it among those whom misfortune, unmerited always in this laborious world, may have rendered necessitous...
Maurice Maeterlinck 「The Life of the Bee」
...The work is so laborious and the worker so feeble! I cannot tell how long it is since my bantlings attained their object...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...A suitable phrase, placed in its correct position and saying without fuss the things we want to say, necessitates a choice, an often laborious choice...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The draftsmanship is so accurate that it is easy to deduce from it beautiful theorems, which would be very laborious to work out by the calculus...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The efforts of the most laborious of lives have ended in this lamentable relic...
J. Henri Fabre Alexander Teixeira de Mattos 「The Mason-bees」
...I repeat my laborious expedition to the Bois des Issards over and over again; and each time I see the males as assiduous as ever in skimming over the ground...
J. Henri Fabre 「More Hunting Wasps」
...There is thus no fear that the contents of the cells may become mixed or transposed; and I am saved the trouble of keeping a laborious watch...
J. Henri Fabre 「Bramble-bees and Others」
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