A small but effective tool or method can achieve significant results; emphasizing quality and precision over quantity or size.
在辩论中，他常常寸铁杀人，用一句精辟的话就击中要害，让对手哑口无言
In debates, he often achieves 'inch-of-iron' effectiveness, hitting the crucial point with a single insightful remark and leaving his opponents speechless.
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