Someseaurchins海胆havevenomous(toxin)spines

Oneofthegreatestbreakthroughsforprofessionalwomencamein1973whenthefieldofbankingopenedupforthem.

Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.

InthenortheasternUnitedStates,itrainsintermittently间歇地throughoutthespring.

Theflowerbudofawaterlily百合opensatsunsetsince.itsopeningistriggered(commence).bythedecreasedlight.