Tā de jìshù shuǐpíng bǐ wǒmen lǐngxiān hǎo jǐ guāngnián.
His technical level is several light-years ahead of ours.
Tips
mistakes
光年 is a unit of distance, not time — even though it contains 年 (year). One light-year is the distance light travels in one year (about 9.46 trillion kilometers). The same misconception exists in English.
