Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
The company issues an annual report every March.
Alligators still exist in some of the dank 潮湿 swamps and bayous小海湾 of Alabama's coastal regions.
Thefearofsmallpox,whichterrorizedtheeighteenthcentury,hasnoanalogy(likeness)today.
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.