拼音:yī wán kě fēng
注音:ㄧㄨㄢˊㄎㄜˇㄈㄥ
解释:一丸:一团小泥丸;封:封闭。用一小团小泥丸就可把函谷关封闭住。比喻地形险要,用少量兵力即可固守。
出处:《后汉书·隗嚣传》:“元请以一丸泥为大王东封函谷关,此万世一时也。”
One pill: a small ball of mud; Seal: closed. Hangu pass can be sealed with a small ball of mud. It is a metaphor for the dangerous terrain, which can be defended with a small number of troops.
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