固若金汤[gù ruò jīn tāng]
词典impregnable：攻不破的，坚不可摧的；无可辩驳；毫不动摇。
词典as strong as iron：固若金汤。
词典be secure against assault：固若金汤；坚不可摧。
词典固若金汤什么意思
词典strongly fortified：森严壁垒；固若金汤；壁垒森严。
固若金汤[gù ruò jīn tāng]
(city's defenses) as strong as iron; be secure against assault; strongly fortified; impregnable
1. Fort Knox：Absolutely, sir.|那当然,长官 | Fort Knox.|固若金汤 | Ambassador.|大使先生
2. rock solid：ready to ship为投放市场做好准备 | rock solid 固若金汤 | embackment 路堤