created sense approved 一夫当关，万夫莫开/一夫當關，萬夫莫開 · yīfūdāngguān, wànfūmòkāi · impregnable
一夫当关，万夫莫开 / 一夫當關，萬夫莫開
yīfūdāngguān, wànfūmòkāi
impregnable
one man guarding the pass can prevent the passage of ten thousand; a strategic, easily defended position
这里的地势极其险要，真是一夫当关，万夫莫开。