未ㄨㄟˋwèi達ㄉㄚˊdá一ㄧyī間ㄐㄧㄢˋjiàn

相去幾微。漢·揚雄《法言·問神》：「顏淵亦潛心於仲尼矣，未達一間耳。」

英differing only slightly, not much between them