The flower bud of a water lily 百合 opens at sunset since .its opening is triggered(commence) .by the decreased light.
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Alligators still exist in some of the dank 潮湿 swamps and bayous小海湾 of Alabama's coastal regions.
In1861itseemedinevitablethattheSouthernstateswouldbreakawayfromtheUnion.
People who do not sleep enough tend to become irritable .
Someseaurchins海胆havevenomous(toxin)spines
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.