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1·They were sworn to secrecy.

他们被要求发誓保密。《柯林斯英汉双解大词典》

2·They were all pledged to secrecy.

他们都宣誓保密。《牛津词典》

3·Everyone involved was sworn to secrecy.

所有相关人员均宣誓保密。《牛津词典》

4·Their work is carried out behind a veil of secrecy.

他们的工作是在秘密掩护下进行的。《牛津词典》

5·The trial was conducted under a blanket of secrecy.

审讯在高度保密下进行。《牛津词典》

6·The congressman was accused of a breach of secrecy rules.

这个国会议员被指控违反保密条例。《柯林斯英汉双解大词典》

7·All the research was conducted behind a screen of secrecy.

整个研究始终是秘密进行的。《牛津词典》

8·She was bursting to announce the news but was sworn to secrecy.

她忍不住想要发布这条消息，但发过誓要保密。《柯林斯英汉双解大词典》

9·Preparations for the wedding were made under a cloak of secrecy.

婚礼的准备工作是在秘密的掩饰中进行的。《柯林斯英汉双解大词典》

10·The government has thrown a blanket of secrecy over the details.

政府已对这些细节严加保密。《柯林斯英汉双解大词典》

(1)in secrecy保密地