They can also measure the geometry of space. That allows them to deduce the total density of energy and matter in the universe and infer the amount of dark energy.
他们还能通过测量空间几何推断出宇宙中能量和物质的总密度，并推算暗能量的总和。
Within limits, the longer the adenine tail is, the larger is its footprint on the substrate, and the lower the total density of DNA strands.
在一定范围内，腺嘌呤尾越长，其在底物面上的“足迹”越长，DNA链的总密度越低。
But the lessening of virtual breadth of the annular electrode makes the radial distribution of plasma density more unequal, and the total density and the average temperature lower.
但环电极有效宽度的减小使得等离子体密度的分布更不均匀，并使总的密度和平均温度均下降。
But the lessening of virtual breadth of the annular electrode makes the radial distribution of plasma density more unequal, and the total density and the average temperature lower.
但环电极有效宽度的减小使得等离子体密度的分布更不均匀，并使总的密度和平均温度均下降。
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