Amid thy desert-walks the lapwing flies, And tires their echoes with unvaried cries.
The wise teacher knows that 55 minutes of work plus 5 minutes laughter are worth twice as much as 60 minutes of unvaried work.
Lovely are the curves of the white owl sweeping Wavy in the dusk lit by one large star. Lone on the fir-branch, his rattle-note unvaried, Brooding o'er the gloom, spins the brown eve-jar.