Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.
A、straightHowmanypeopleareawarethatadancerwiththeNewYorkCityBallettypicallywearsoutaminimumoftwohundredpairsoftoeshoesperyear?
Blue－greenalgaegrowabundantlyinsaltmarshes.
Urbanrenewalprogramsstrivetoupgradeareasthatarebecomingslums.
In calculating the daily calorie requirements for an individual, variations in body size, physical activity, and age should be taken into account.
In 1974 Henry Aaron broke Babe Ruth's monumental lifetime record of 714 home runs.
