An ornithopter (from Greek "ornithos" "bird" and "pteron" "wing") is an aircraft that flies by flapping its wings.
An ornithopter from the ancient Greek language is an aircraft that flies by flapping its wings.
An ornithopter from the ancient Greek language is an aircraft that flies by flapping its wings.
문장을 간단하게 만드십시오: An ornithopter (from Greek "ornithos" "bird" and "pteron" "wing") is an aircraft that flies by flapping its wings. 산출: