to cast短语⁸⁰¹⁴ 基本例句 出铁 That would enable physicists to see whether the number of high-energy positrons matches the theory’s expectation and thus, appropriately, use shadows to cast light on the existence of dark matter. 这就可以让物理学家们来检验高能正电子的数量是否和理论预期的数量相符。从而，也就能用阴影“照亮”暗物质的存在之谜了。 ecocn