保密的英文：
keep secret
keep sth. dark from sb.
maintain secrecy
practise secrecy

参考例句：
  • "The test questions are kept secret, so as to prevent cheating."
    "试题必须保密,以防作弊。"
  • I don't know why Fred is always secretive as regards his family.
    我不知道为什么凡涉及到他的家，弗雷德总是保密。
  • Its members are bound by a rigid code of ethics which includes confidentiality.
    它的成员受到包括保密在内的一套严格的伦理规范的约束。
  • Phishing, used by hackers to collect confidential information by pretending to be a trustworthy source, first appears.
    “网络钓鱼”是指黑客伪装成可信赖的来源，搜集用户保密信息的行为。这种行为在上世纪90年代中期首次出现。
  • Keep secret; keep confidential
    把..保密;保密
  • As secret as the grave
    绝对保密
  • It is hard to keep a secret.
    保密很难。
  • The meeting was arranged with the utmost secrecy,ie very secretly.
    会议绝对保密.
  • His report was treated with extraordinary secrecy.
    他的报告被严格保密。
  • They went to absurd lengths to keep the affair secret
    他们为了保密无所不用其极
keep是什么意思：
v. 保持，处于；继续，重复；使耽搁；抚养；履行
n. 生活费，生活必需品
  • That news will keep.
    那个消息留待以后再宣布。
  • They keep a shop.
    他们经营一家商店。
  • How are you keeping?
    你最近还好吧？
secret是什么意思：
adj. 秘密的，机密的；私下的；隐蔽的；神秘的；偏僻的
n. 秘密，机密；内情；神秘，奥秘；秘诀，诀窍；秘方
  • A secret between more than two is no secret
    两人以上知道的秘密就不算秘密
  • I confide a secret to a friend.
    我向朋友吐露了秘密。
  • The secret store is headquartered abroad.
    这家黑店的总部设在国外。
sth是什么意思：
abbr. something的缩略词
  • average sth out(at sth);calculate the average of sth
    算出某事物的平均数
  • be agreeable to sth
    欣然同意某事
  • at/on the altar of sth
    因为，为了（值得为之受苦的事）

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