We must understand that mistakes are unavoidable.

我们应该知道：错误是避免不了的。

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We must understand that it is God's very nature to love.

我们必须明白爱就是上帝的本质。

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We must understand that "sky gardens", only by later generations of historical records and modern archaeological excavations.

自己们要理解“空中花圃”，只能经过后世地汗青记录和近代地考古开掘。

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We must understand that the boulder that is the U.S. economy will not simply just start rolling again.

FORBES: The Bush Tax Rates Are Too High To Move This Boulder

We must understand that only when she, and people like her can walk on the streets unafraid will we have properly defended our freedom.

CENTERFORSECURITYPOLICY: Hirsi Ali's challenge to humanity

Moreover, we must understand that inflation is not a natural phenomenon.

FORBES: The Government, The Retiree And Financial Repression