And yet these "artificial floods" still carry clear risks.

巨大投入之外，“人造洪水”的风险鲜为人知。

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She needed a clear head to carry out her instructions.

她需要一个清醒的头脑来执行命令。

《柯林斯英汉双解大词典》

Many apes and monkeys carry their own strain of S.I.V, but it's not clear how long the viruses have been infecting primates.

很多猩猩和猴子都带有自己的SIV毒株，但病毒感染灵长类多久了一直不清楚。

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Walking away with more moonmen than she could carry Sunday evening, its clear VMA voters were gaga for the lady.

FORBES: From Justin Bieber to Lady Gaga, the MTV VMA's Real Winners and Losers

Our hero was soon limping, it became clear he could not carry on and he was eventually replaced by Darius Vassell.

BBC: 03.10.04 BACK TO EARTH

"The government has made it clear that it intends to carry out a thorough review to reduce the risks of future disease outbreaks, " she said.

BBC: Disease source 'may not be traced'