“second”的概念、定义、翻译、参考文献-科学参考

单词	second
释义	second [`sek·ǝnd] ^MATHEMATICS A unit of plane angle, equal to 1/60 minute, or 1/3,600 degree, or π/648,000 radian. ^MECHANICS The fundamental unit of time equal to 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of an atom of cesium- 133. Abbreviated s: sec.
随便看	bootstrap process bootstrap program bootstrap sawtooth generator bootstrap scheme bootstrap technique Bopyridae Bopyrina Bopyroidea bora boracic acid boracite bora fog Boraginaceae Boralf borane borate borate mineral borax borax glass borazole borazon Borda mouthpiece Bordeaux mixture bordered bordered pit

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