geocorona van allen belt van allen radiation belts
Related Translations:
范: 名词1.[书面语] (模子) pattern; mould; matrix 短语和例子铁范 iron mould2.(模范; 榜样) model; example 短语和例子规范 model of conduct; 典范 example3.(范围) boundary; limits 短语和例子闺范 rules of propriety for ladies and marr
