照相底板 photoplate
photographic plate
- 在照相底板上不同的同位素的离子会聚于不同点。
at different points on the photographic plate. - 在照相底板上不同的同位素的离子会聚于不同点。
Ions of different isotopes converge at different points on the photographic plate . - 被望远镜的透镜或反射镜所收集的光线,如今直接射到照相底板上,而不是天文学家的眼睛里。
Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye.