as firm (/hard/steady/steadfast/solid) as a rock; monolithic;rock-firm ? 我國(guó)各族人民之間的團(tuán)結(jié)～。The solidarity between the nationalities of our country is as firm as a rock.
堅(jiān)如磐石jiān rú pán shí
磐石：大而厚的石頭。比喻十分堅(jiān)固，不可動(dòng)搖。solid as a rock, rock-firm, as firm as a rock, granite