The cone produces light of two degrees of intensity, with a central brightly lit section that acts as a point source, and a surrounding dimly lit section.是什么意思_The cone produces light of two degrees of intensity, with a central brightly lit section that acts as a point source, and a surrounding dimly lit section.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句