[英][?env?l?up][美][nvlop, ?ɑn-]
n.
信封，封皮；殼層，外殼；包裹物；[生物學]膜，包袋
復數: envelopes
雙語例句
1.
the flap of an envelope
信封的封蓋
2.
Make sure you've signed the cheque before sealing theenvelope.
壹定要在支票上簽了名再封信封。
3.
Please enclose a stamped addressed envelope to get your test results.
請附姓名地址郵資俱全的信封，以便把化驗結果寄給妳。
4.
Although I moistened it,the flap doesn't stick to the envelope.
我把信封弄濕了，可是信封口蓋還是粘不上。
5.
I folded the letter and then put it into the envelope.
我把信折好後放進信封裏。