envelope

US [ˈɑnvəˌloʊp]
UK [ˈenvələʊp]
  • n.信封;塑料封套;塑料封皮
  • Web包络;包膜;包络线
Plural Form:envelopes  
Envelope
n.
1.
信封a flat paper container used for sending letters in
writing paper and envelopes
信纸和信封
an airmail/padded/prepaid envelope
航空╱有垫料夹层的╱预付邮资信封
2.
塑料封套;塑料封皮a flat container made of plastic for keeping papers in

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard