这类手术需要恒定的X光，并且需要耗费很长时间才能完成。 手术过程中放射出的X光会对医生造成有害辐射，在手术过程中必须要求医生穿上防护性背心。
This type of surgery involves constantx-rays and can take a long time to complete, exposing the physician toharmful radiation and mandating that they wear a heavy protective vestwhile operating.
弱光放大达到准稳态之后的下降过程为瞬态能量转移的时间指数衰减过程与光散射引起的能量耗散的共同贡献。
The decrease of the amplified light intensity after the steady-state is due to the decreases of the transient energy transfer with time and the energy dissipation caused by the beam fanning.
光作用过程的时间特性在很大程度上决定了卤化银材料性能的优劣。
The time characters of the photon action process determine the quality of the silver halide material to a great degree.
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