wàng zhe / tā / lí qù / de / bèi yǐng / tā / xīn rú dāo jiǎo / lèi liú mǎn miàn

望着她离去的背影，他心如刀绞，泪流满面。

Watching her figure walking away, his heart felt like it was being cut by a knife, and tears streamed down his face.