He passed the letters to the Department of Trade and Industry.他把信交给了贸工部。I am expecting several important letters but nothing has arrived.我正在等几封重要的信件，可是一封都没到。We delved through a sackful of letters to draw the winning name...
In Morse code all letters are four or fewer characters long.在Morse电码中所有字母的长度只有四个或不到四个符号.He covered his tracks, burnt letters and diaries...他掩盖形迹，烧毁了信件与日记。They used chisels to chip the letters into the stone.他们用凿子在石头上刻出字母...