1. 证明...很好：speak volumes 很有意义 | speak well for 证明很好 | speak with a lisp 口齿不清地说
2. 证实...很好：speak for / / 代表...讲话;要求得到 | speak well for / / 证实...很好 | to speak of / / 值得一提的
3. 证明...很：heart and soul / / 全心全意(地) | speak for / / 代表...讲话;要求得到 | speak well for / / 证明...很
4. 证明...有效：speak volumes for ...有力地证明 | speak well for ...证明...有效 | speak well of...称赞