TutorABC: The Silent Aircraft

**Vocabulary
1. stingray 魟魚
2. cylindrical 圓柱狀(cylinder)的
3. flap: A part of the wing of an aircraft that can be raised or lowered to help the aircraft go up or down
4. slat: It is a control surface along the edge of a wing that can be extended forward to improve airflow
5. undercarriage: it is the wheels under an aircraft that supports and allows the aircraft to move on the ground
6. roaring sound 轟響
7. fuselage 機身
8. air intake duct 通風導管
9. insulate 隔離=isolate
10. incoporate 加進、包含、吸收
11. confrontation 對抗、比較
12. viability 可能、可行性
13. sadden 使傷心、難過
14. cockpit 駕駛座艙

**Useful phrase:
1. what passenger class do you take?
2. air travel
3. it is in study 在研究中
4. in a conceptual stage