Some sea urchins海胆 have venomous (toxin) spines
C
暂无解析
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Urbanrenewalprogramsstrivetoupgradeareasthatarebecomingslums.
Withtheacquisitionofsmallercompaniesbylargerones,the1960'ssawawaveofnewconglomerates.
Anoversight遗漏(miss,overslaugh)inproofreadingoftenresultsinprintederrors.
ThefuturesurvivalofthebaldeagleisstillanimportantAmericanecologicalconcern.