The issues are broad and complex.
问题是广泛而复杂的。
This topic is broad and can be complex.
这个话题很广泛，并且可能很复杂。
The world is too big and too complex to be covered by broad general statements.
世界太大、又太复杂，很难简单概括说明。
The world is too big and too complex to be covered by broad general statements.
世界太大、又太复杂，很难简单概括说明。
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