If sth. is allowed to take its course, it will be sure/bound to bring about/leave/entail desired (unexpected/grave/immediate/reverse/disastrous/far-re aching) effects/consequences/influences.
如果我们任其自然，某事物将肯定/必然会引起/导致/带来理想的（出乎意料的/严重的/接踵而来的/适得其反的/灾难性的/深远的）效应/后果/影响。
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