Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.
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Bats fly, rather than glide, and thus are the only mammals capable of true flight.
Alligators still exist in some of the dank 潮湿 swamps and bayous小海湾 of Alabama's coastal regions.
Thefirstpaperwasmadefromthebarkofthemulberrytree.
Some cosmetics manufacturers attempt to capture the rose's unmistakable fragrance香味 in soaps and perfumes.
DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.