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1·I returned the letter unopened.

我原封不动地将信退了回去。《牛津词典》

2·The letter was intercepted.

信被截查了。《牛津词典》

3·'Dearest Nina', the letter began.

“最亲爱的尼娜”，信的开始这样写道。《牛津词典》

4·The letter was returned unopened.

信被原封不动地退回了。《牛津词典》

5·The letter was marked 'Personal'.

信上标注着“私人”字样。《牛津词典》

6·The letter was peremptory in tone.

信中的语气强硬。《牛津词典》

7·She handed me the letter.

她把信交给我。《牛津词典》

8·He gazed at the letter, unbelieving.

他两眼盯着信，满腹狐疑。《牛津词典》

9·The letter should arrive any day now.

信很快就该到了。《牛津词典》

10·He opened the letter with trembling hands.

他双手哆嗦着把信打开。《牛津词典》