Envelope
01
봉투, 포장
a thin, paper cover in which we put and send a letter
예시들
She found an old envelope with photos in it.
그녀는 사진이 들어 있는 오래된 봉투를 발견했다.
02
봉투, 포장
any wrapper or covering
03
봉투, 가스 주머니
the bag containing the gas in a balloon
04
봉투, 운용 한계
the maximum operating capability of a system (especially an aircraft)
05
봉투, 덮개
a natural covering (as by a fluid)
06
포락선, 봉투
a curve that is tangent to each of a family of curves
