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.
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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