That is a lesson to us: we must take rules seriously.

这对我们是一个教训：我们必须认真对待规则。

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The exam is very important to us, so we must take it seriously.

考试对我们很重要，所以我们必须认真对待。

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"The reason why India must take environment seriously is because it is becoming a very serious public health concern," said Ramesh.

拉梅什说：“印度必须严肃对待环境问题的原因是因为环境正在变成严重的公共健康问题。”

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Thus, we must take seriously the incitement to hatred that creates the intellectual atmosphere in which terrorism can flourish.

CENTERFORSECURITYPOLICY: The War on Terrorism �� America��s War and Israel��s

He also said that, even though U.S. actions have weakened al-Qaida since the Sept. 11 attacks, Americans must take seriously the words of the enemy.

NPR: White House Freshens Anti-Terrorism Strategy

Reading as both a religious duty to kill millions of Americans and a lengthy suicide note together, this piece of literature is something we must take seriously with Zawahiri now at the helm of al-Qaeda.

FORBES: New al-Qaeda Chief Zawahiri Has Strong Nuclear Intent