“age of the earth”的概念、定义、习题解题方法及翻译-物理辞典

单词	age of the earth
释义	age of the earth The time since the earth emerged as a planet of the sun, estimated by dating techniques to be about 4.6 × 10⁹ years. The oldest known rocks on earth are estimated by their radioactive age to be about 3.5 × 10⁹ years old. The earth is older than this because of the long time it took to cool. An estimate for the cooling time is included in the estimate for the age of the earth
随便看	parabolic reflector paraboloid parallax parallel circuits parallel processing parallel spins parallelepiped parallelogram of forces parallelogram of vectors parallelogram of velocities paramagnetism parametric equation parasitic capture paraxial ray parent parity parsec partial partial derivative partial eclipse partial pressure particle particle physics particle-beam experiments particle-in-a-box

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。