doctoral什么意思？

doctoral的音标：doctoral的英式发音音标为：['dɒktərəl]doctoral的美式发音音标为：['dɑktərəl]...

His doctoral dissertation on differential equations connected itself with existence theorems.他论述微分方程的博士论文涉及到存在理论.He wrote his doctoral thesis on electromagnetism.他写有关电磁的博士论文.He was involved in writing his doctoral disser...