Air in contact with the radiator warms and rises because it is lighter than the other air in the room.
Air in contact with the radiator warms and rises because it is lighter than the other air in the room.
与暧气片接触的空气受热且上升，因为他比房间中其他地方的空气更轻。
Air in contact with the radiator warms and rises because it is lighter than the other air in the room.
与暧气片接触的空气受热且上升，因为他比房间中其他地方的空气更轻。