a door used in addition to a normal door, that consists of a screen that lets in light and air but keeps out insects 屏蔽门:除普通门外还使用的门,它由一个可以遮挡光线和空气但能阻止昆虫进入的屏幕组成 Before air-conditioning, people relied on fans, open windows and screen doors. 在空调出现之前,人们靠的是风扇、开着的窗户和纱门。