俗话

sú huà shuō méi tóu yī zhòu jì shàng xīn lái

俗话说：“眉头一皱，计上心来。”

As a common saying goes, "Knit the brows and you will hit upon a stratagem."

rú tóng sú huà suǒ shuō wú huǒ bù shēng yān

如同俗话所说：“无火不生烟。”

As the saying goes, "There's no smoke without fire."

sú huà shuō de hǎo yǎn jiàn wéi shí ěr tīng wéi xū

俗话说得好，眼见为实，耳听为虚。

According to the old adage, seeing is believing.