After a thorough investigation, many experts now believe that the streak was a run-of-the-mill jet aircraft contrail.

经过彻底的调查，许多专家现在认为，这条轨迹是一条普通的喷气式飞机尾迹。

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The committee reported its findings after a thorough investigation.

委员会在彻底调查以后报告了调查结果。

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After a thorough investigation, we have found that a player of the account listed above participated in activities designed to gain an unfair advantage in the World of Warcraft economy.

经过彻底调查，我们发现，一个球员的帐户上面列出参加了活动，目的是获得了不公平的优势在魔兽世界的经济。

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"There should be nothing in the crib but the baby, " says Rachel Moon, who heads the AAP's task force on Sudden Infant Death Syndrome (SIDS), officially any death of a baby under age 1 that remains unexplained after a thorough investigation.

WSJ: When a Cuddly Crib Puts the Baby in Danger

While some have criticized the FTC for not bringing the lawsuit they have clamored for, this prudent approach after a thorough and warranted investigation shows that antitrust enforcement, in the hands of responsible regulators, is sufficiently adaptable to the realities of the Internet age.

FORBES: FTC's Google Settlement a "Third Way" Approach for Antitrust Enforcement

The chances of a thorough investigation in the US increased after the Democratic Party took control of Congress last year.

BBC: The CIA is believed to have flown at least 1,200 flights