Whencarbonisaddedtoironintheproperproportions,theresultissteel.
A、containerFoodmustbemoistinordertohaveataste.
HowmanypeopleareawarethatadancerwiththeNewYorkCityBallettypicallywearsoutaminimumoftwohundredpairsoftoeshoesperyear?
Urbanrenewalprogramsstrivetoupgradeareasthatarebecomingslums.
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.