balloon. n. 气球;热气球 v. (突然)膨胀，涨大;乘热气球飞行 The world\'s first transatlantic balloon race ended in chaos last night 昨晚世界第一届跨...
air balloon 气球。复数是直接加s。 例句 When the lanterns are lit, they slowly rise into the air like small hot air balloons for all to see. 当灯...
rain 是不可数名词，没有复数形式的。wind是可数的，复数winds表示一阵阵的风。 例句 The rain was falling steadily. 雨不停地下着。 The rain kept up all...
