They let scientists use a kind of light microscopy called fluorescent microscopy to study specific parts of a sample.

科学家使用一种叫做荧光显微镜的光学显微镜来研究样品的特定部分。

And, sure enough, fluorescent microscopy confirmed that fragments of P. larvae were getting into royal jelly secreted by those bees which had been fed with the laced sugarwater.

果然，荧光显微镜证实了幼虫芽孢杆菌的碎片进入了那些用加了糖水的蜜蜂分泌的蜂王浆中。