多年来

这zhè发明fāmíng是shì多年来duōniánlái耐心nàixīn实验shíyàn的de成果chéngguǒ。

This invention was the result of years of patient experiment.

看到kàndào多年来duōniánlái事物shìwù如何rúhé改变gǎibiàn是shì很hěn有趣yǒuqù的de。

It's interesting to see how things have changed over the years.

多年来duōniánlái汤姆Tāngmǔ一直yīzhí在zài忍受rěnshòu偏头痛piāntóutòng之zhī苦kǔ。

For many years, Tom has been suffering from migraines.

他tā多年来duōniánlái欺压qīyā邻里línlǐ，最终zuìzhōng身陷囹圄shēnxiànlíngyǔ，真是zhēnshi恶有恶报èyǒu'èbào。

For years, he bullied his neighbors, and in the end, he ended up in prison, getting what he deserved.