<ul id="00qcq"></ul> ◎唇齒相依chúnchǐ-xiāngyī
[be closely related and mutually dependent like the lips and teeth] 嘴唇和牙齒互相依靠。比喻互相依存，關系密切
王師屢征而未有所克者，蓋以吳、蜀唇齒相依，憑阻山水，有難拔之勢故也?！?span id="k0ieamcki8" class="bold">《三國志·魏書·鮑勛傳》
(好工具)<strike id="8ygy0"></strike>