Poor communication with my thesis adviser kept me from finishing my PhD. After changing thesis topics twice, I made poor progress on the third topic. What's more, after living in the US for seven years, I wanted so much to come home and see my family, so the PhD just got left behind.
博士沒念完，原因是和指導教授溝通不良，結果論文改了兩次題目，第三個題目的進度也不太順利，加上在美國七年了，實在很想回來看家人，博士學位就拖了下來。