Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
A、bythebookWithlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野
InthenortheasternUnitedStates,itrainsintermittently间歇地throughoutthespring.
Creamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
An oversight 遗漏 (miss, overslaugh) in proofreading often results in printed errors.
Somechildrendisplayanunquenchable难以抑制的curiosityabouteverynewthingtheyencounter.
