letter opener
A knifelike device with a blunt edge, used for slicing letters open.
(medicine, uncountable) The use of nanotechnology for diagnosing, treating and preventing disease. / (medicine, countable) Any medicine containing nanoparticles.
(informal) The quality of being able to be enjoyed as rock music.
plural of pKa
彼女は招待状を傷つけないように、封筒の上部をきれいに切るためにペーパーナイフを使った。
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DiQt
Free
★★★★★★★★★★
