She's studying for her doctorate.她正在攻读博士学位。He received a doctorate of philosophy in political science at Columbia University.他获哥伦比亚大学政治学博士学位.He hasn't enough credits to get his doctorate.他的学分不够取得博士学位....
Since the time of shipment can not be fixed, I can not but worry about it.交货期还没定下来, 我怎么会不着急呢?One can not but be moved by his fate.人们不能不为他的命运所感动.We can not but listen to the command of the powerful department.我们不得不听从强力部门的...