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...
His prose is vigorous and dense, occasionally to the point of obscurity.他的散文文笔有力、内容庞杂，有时几近晦涩。The actress was only 17 when she was plucked from obscurity and made a star.这个演员受到提携从无名少女一跃成为明星时年仅17岁。The obscurity of the pass...