ra

听听怎么读

是什么意思

abbr.

rain 雨；radioactivity 放射性[强度]；radioactive 放射性的；radio 无线电通讯

英英释义

ra[ ra: ]

n.
- an intensely radioactive metallic element that occurs in minute amounts in uranium ores
  同义词：radiumatomic number 88
- ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods
  同义词：Re
- (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
  同义词：right ascensioncelestial longitude

学习怎么用

权威例句

Bone RC, Balk RA, Cerra FB, et al: Definitions for sepsis and organ failure and guidelines for the use of innovative therapies in se...
Phase II placebo-controlled randomized discontinuation trial of sorafenib in patients with metastatic renal cell carcinoma : Ratain ...
AISYAH BINTI ABU BAKAR RA : WANITA ISTIMEWA YANG MELAMPAUI ZAMANNYA
Odia Gadya Sahitya Ra Bikash Dhara Vol 2
Covering system
Hallmarks of cancer: the next generation.
Econometric Analysis of Cross Section and Panel Data, 2nd edition
Systematic and integrative analysis of large gene lists using DAVID bioinformatics resources
Assessing the quality of reports of randomized clinical trials: is blinding necessary?
Definitions for sepsis and organ failure and guidelines for the use of innovative therapies in sepsis. The ACCP/SCCM Consensus Confe...

r开头的单词