1.
A promise is weightier than one thousand bars of gold第一个直接且形象
2.
That's solemn promise
以上两个都可以是一诺千金
3.这个成语的形容词形式：true to one's words
1.
A promise is weightier than one thousand bars of gold第一个直接且形象
2.
That's solemn promise
以上两个都可以是一诺千金
3.这个成语的形容词形式：true to one's words