信纸

也是这样一个有着洁净月色的晚上，我铺开信纸，我的笔尖是随着感觉滑动的。

letter of indemnity

certificate of authorization【法】;letter of authorization【法】;power of attorney【法】

usance letter of credit

reciprocal letter of credit

letter scale (letter balance), moisture weigher, sedimentation scale,

four-letter word

letter of recommendation

letter book