每年他们都要参加著名的全州自行车大赛。Each year they compete in a prominent statewide bicycle race.他担任过改装赛车大赛的主持人。He acted as grand marshal of a stock car race.NBA大赛the National Basketball Association Championship...
Mars has an insubstantial atmosphere, consisting almost entirely of carbon dioxide...火星的大气层极其稀薄,几乎全部由二氧化碳构成。Gasfired heaters should not be used in corrosive or explosive atmosphere.燃烧煤气的加热器不宜用于有腐蚀性或危险性的气体中.As the lungs e...