这时有些电子或离子与油滴碰撞而粘附在油滴上.Some of the electrons or ions then collide with the drops and stick to them.当给予适当照明时,这样小的油滴在显微镜下是很容易看到的.A drop of oil of this size is easily seen in a microscope when suitably illuminated.这些油滴一般都带负电...

“油滴”的英语可以翻译为：[化] oil drop ...