จาน.....ร่อน สาระการเรียนรู้ภาษาต่างประเทศ ช่วงชั้นที่ 4 มาตรฐาน ต 3.1 ใช้ภาษาต่างประเทศในการเชื่อมโยงความรู้กับกลุ่มสาระ การเรียนรู้อื่น และเป็นพื้นฐานในการพัฒนา แสวงหาความรู้ และเปิดโลกทัศน์ของตน Frisbee A flying disc is generally plastic and roughly 20 to 25 cm diameter, with a lip. The shape of the disc, an airfoil in cross-section, allows it to fly by generating lift as it moves through the air while spinning. Flying discs are thrown and caught for free-form recreation and as part of many different flying disc games. Disc golf discs are usually smaller but denser and tailored for particular flight to increase/decrease stability and distance. Disc dog sports use relatively slow flying discs made of more pliable material to better resist a dog's bite and prevent injury to the dog. Flying rings are also available; they typically travel significantly farther than any traditional flying disc. There are also illuminated discs meant for nighttime play. Vocabulary : diameter (n) a straight line that reaches from one point on the edge of a round shape or object, through its centre. airfoil(n) a surface such as the wing of an airplane designed to provide reactive force when in motion relative to the surrounding air. recreation (n) enjoying yourself when you are not working dense(adj.) difficult to go or see through pliable (adj.) be able to bend easily without breaking or cracking illuminate (v.) to light something and make it brighter