In actual practice a brighter image is obtained by using a broad, rather than a point, source along with a substage condenser.
在实际工作中，不是用点光源而是用一个扩展光源加一个台下聚光镜以得到一个较亮的象。
In actual practice a brighter image is obtained by using a broad, rather than a point, source along with a substage condenser.
在实际工作中，不是用点光源而是用一个扩展光源加一个台下聚光镜以得到一个较亮的象。
应用推荐