Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
A、ontopofSolid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.
The fear of smallpox, which terrorized the eighteenth century, has no analogy(likeness) today.
Blue－greenalgaegrowabundantlyinsaltmarshes.
Formulatedin1823,theMonroeDoctrineassertedthattheAmericaswerenolongeropentoEuropeancolonization.
Theflowerbudofawaterlily百合opensatsunsetsince.itsopeningistriggered(commence).bythedecreasedlight.
