Walk the Talk 言行一致;言出必行;说到做到;知行合一;言传身教

【例句】
To be a good leader, one has to walk the talk.
要成为一个好领导，必须言行一致。

The entrepreneur says he will commit himself to social responsibilities, but people doubt if he will walk the talk.
这位企业家说他要承担起社会责任，但人们怀疑他是否会言行一致。