他们计算出这种星体的数量是我们“主星序星体”的两倍。我们的太阳就属于“主星序星体”，现在仍然通过燃烧氢燃料发光。
They calculated that they could be almost twice as common as "main-sequence stars" - such as our own Sun - which are still burning through their hydrogen fuel stock.
从前人的成果，即以人口表示的城市位序-规模法则和以建成区面积表示的位序-规模法则出发，演绎出城市的用地规模和人口数量呈异速增长。
We start at the rank-size rule by urban population and the rank-size rule by urban built-up area, and derive a mathematical relationship that the land use size of a city and its population.
锰胁迫对垂序商陆幼苗的芽影响较小，而对生殖器官影响较大，严重降低了垂序商陆的结实数量与质量。
Mn stress had little effects on the buds of P. Americana seedlings, but large effects on the reproductive organ, resulting in a great decrease of bearing fruit quantity and quality.
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