Numerous astronomical surveys will probe space-stretching dark energy, although figuring out what it is could take much longer than another decade.
大量的天文观测将会探查使宇宙延展的暗能量，即使再花上十数年才有可能搞清它的真面目。
In other words, how many total system states are there with a particular energy. Well, in many, many, many cases the answer is some astronomical number.
换句话说，我们要知道对于给定，能量系统可以处于多少个状态，一般来说在很多情况下，这个数是个天文数字。
The law of conservation and transformation of energy is the chief basis of physical, astronomical and chemical reasoning as well as of engineering practice.
能量守恒笔能量转换定律不仅是工程实践的主要基础，而且也是物理、天文以及化学等方面的主要基础。
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