单词	A roll
释义	A roll 🌏是一卷
随便看	hydrogen-ionizing detector hydrogen ion potentiometer hydrogen ions Hydrogen Ions hydrogen ion test paper hydrogen ionthe proton hydrogen ion titration curve hydrogen-ion transfer hydrogen ion welding Hydrogen is a one-valence element hydrogenisation hydrogenisator Hydrogen is by far the lightest of all elements hydrogenise hydrogenised hydrogenises Hydrogen is highly explosive hydrogenising Hydrogen is lighter than oxygen hydrogen isocyanide hydrogen isocyanidehnc hydrogen isomerization process hydrogen isotope hydrogen isotope effect hydrogen isotope exchange