例句與造句

1. For phase contrast microscopy the phase ring ( at the back focal plane of the objective ) and the annulus ( at the back focal plane of the condenser lens ) should appear in focus and in alignment.
2. Any optical components at the back focal plane of the objective ( e . g . the phase ring for phase contrast microscopy ) and at the condenser diaphragm ( e . g . the annulus for phase contrast microscopy ) should also appear in focus.
3. It's difficult to find phasing ring in a sentence. 用phasing ring造句挺難的