Yī gēléi děngyú měi gōngjīn xīshōu yī jiāo'ěr de néngliàng.
One gray equals one joule of energy absorbed per kilogram.
Tips
usage
Loanword used mainly in Taiwan and physics/medical writing. The unit is named after British physicist Louis Harold Gray.
memory
Easy to confuse with the surname-like sound 'gēléi' — but here both characters are pure phonetic carriers, not meaningful: 戈 'spear' + 雷 'thunder' just transliterate 'Gray.'
