信心百倍

tā men yào shi xìn xīn bǎi bèi de huà yě jiù bù huì jiào wǒ le

他们要是信心百倍的话，也就不会叫我了。

If they were blooming with confidence they wouldn't need me.

tā xìn xīn bǎi bèi de chēng tā de chǎn pǐn shì shì chǎng shang zuì wù yǒu suǒ zhí de

他信心百倍地称他的产品是市场上最物有所值的。

He confidently proclaims that he is offering the best value in the market.