全部

1·He found no direct evidence to identify a leaker.

他找不到直接证据来确认泄密者。《柯林斯英汉双解大词典》

2·But once embarrassing private information has been disclosed, it stays public, no matter how the leaker is punished.

但是令人难堪的私人信息一旦暴露，无论怎样惩罚泄密者，这些信息已经昭然于世，它们将永远曝光在公众目光之下。

3·In this paper, results from both seal test and internal vapor content test are analyzed and compared, which educes the problem of one-way-leaker.

文章通过对器件的密封性测试结果和内部水汽含量测试结果进行对比分析，引出器件的“单向泄漏”问题；

4·After my Apple news site, Think Secret, published details of Apple's Mac mini two weeks before the product was officially announced, the company sued me in an attempt to ferret out the leaker.

在我比产品正式上市时间提早了两周在自己的网站Think secret（一个专门发布苹果相关新闻的网站）上发布了Mac mini的详细信息之后，苹果公司试图通过起诉我来找出泄密者。