metal walls and boiling moats; an impregnable fortress
Tone colorsmāmámǎmàma
Meanings
1 sense · 3 examplesidiom
metal walls and a boiling moat; an impregnable fortress or stronghold
literary用于形容城池或防御工事极其坚固，牢不可破。也可引申比喻难以攻克的难题或坚不可摧的防线。语出《汉书·蒯通传》中的“金城千里，天府之国，天下之形胜也”。
Zhè这
zuò座
chéng城
shì市
zài在
gǔ古
dài代
bèi被
rèn认
wéi为
shì是
jīn金
chéng城
tāng汤
chí池
，
cóng从
wèi未
bèi被
dí敌
jūn军
gōng攻
pò破
。
This city was considered an impregnable fortress in ancient times and was never breached by enemy troops.
Zhè这
zuò座
jūn军
shì事
jī基
dì地
de的
fáng防
yù御
tǐ体
xì系
bèi被
shè设
jì计
chéng成
jīn金
chéng城
tāng汤
chí池
yī一
bān般
。
The defense system of this military base was designed to be like a fortress with metal walls and a boiling moat.
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Tā他
men们
de的
fáng防
xiàn线
jiǎn简
zhí直
gù固
ruò若
jīn金
tāng汤
，
duì对
shǒu手
zhǎo找
bù不
dào到
rèn任
hé何
tū突
pò破
kǒu口
。
Their defensive line is as solid as a fortress; the opponent can't find any breakthrough.