A cold draught eddied, so that the curtain over the door swelled out like a sail filled by the wind.一股冷风打着旋儿刮过，门帘被吹得胀起，像一张鼓满了风的帆。The sails swelled out in the wind.船帆在风中鼓起。He swelled out his chest with pride.他得意洋洋地挺起了胸脯。The balloon swelled out with gas.气球因充气而膨胀。His big belly swells out like a pot.他的大肚子鼓胀着像个大锅。