"The Mars helicopters' maiden flight was successful."
"NASA's Mars helicopter had a successful maiden flight."
- "The Mars helicopters' maiden flight was successful."
"Mars helicopter" 「火星ヘリコプター」
"maiden flight" 「初飛行」
"maiden~" 「初〜」
"successful" 「成功」
"NASA's Mars helicopter had a successful maiden flight."
"NASA's ~" 「なさの〜」
”had a successful maiden flight" 「初飛行に成功」