论文答辩的英文怎么说

论文答辩的英文：
(thesis) oral defense

This is exactly the thesis for trying studying.
这正是本论题试图探讨的问题。

This thesis deals with the physical operation of robots.
这篇论文论及机器人的机体操做。

Is the graduation thesis a requirement for postgraduate students?
研究生都必须撰写毕业论文吗？

He failed the oral.
他口试不及格。

The candidate will take an oral examination.
那个应试者将参加口试。

an infection of the oral pharynx and tonsils by streptococcus.
由于链球菌所导致的喉咙扁桃体感染。

(in a match) the defense
守方

The defenses of the city must be strengthened.
这个城市的防御工事必须加强。

He was the then secretary of Defense.
他是当时的国防部长。