拆封

xìn jiàn hái méi yǒu chāi fēng

信件还没有拆封。

The letter is still sealed.

zhè fēng xìn yǒu diǎn r kě yí wǒ jué de yīng gāi yòng zhēng qì chāi fēng

这封信有点儿可疑，我觉得应该用蒸汽拆封。

The letter was suspicious, and I considered steaming open the envelope.