“potentially hazardous asteroid”的概念、定义、翻译、参考文献-科学参考

单词	potentially hazardous asteroid
释义	potentially hazardous asteroid Astronomy potentially hazardous asteroid缩写：PHA。潜在威胁小行星
随便看	lower Darboux sum lower decimal approximation lower degree lower Denjoy sum lower density lower derivative lower deviation lower directed lower Dirichlet density lowered isothermal model lower end lower end of an integral lower envelope lower envelope principle lower estimate lower factorial lower-flow system lower function lower gastrointestinal bleeding lower half-disk lower half-martingale lower half-plane lower half-space lower heating value lower heat value coal

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