One false step can lead to eternal regret; A single mistake can cause lifelong sorrow or irreparable consequences.
他因为一时冲动做出了错误的选择，最终导致事业停滞不前，真是应验了一失足成千古恨
He made a wrong choice out of momentary impulse, which ultimately led to his career stagnation. It truly exemplifies that one false step can lead to eternal regret.
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