bachelor n. 单身汉，文理学士
例句：He became a Bachelor of Arts at the age of twenty.
他二十岁时成了文学士。

master n．主人，雇主，硕士 adj. 主人的，熟练的，高明的，主要的 vt. 精通
例句：This is an interdisciplinary Master's program participated by five departments.
这是一个有五个系参与的跨学科硕士项目。

masterpiece n. 杰作，名著
例句：Then film was built up to be a masterpiece, but I found it very disappointing.
这部影片被吹捧为杰作，可是我觉得令人失望。

certificate n. 证书，证明书 vt．发给证明书，以证书形式授权给……
例句：To obtain a passport, you have to send in your birth certificate with the form.
要取得护照，你得把出生证和表格一起呈上。

certify v. 证明，保证
例句：Two witnesses must certify that this is your signature.
须有两个见证人证明这确是你的签字。

doctor n. 医生，博士
例句：Austin's illness was more serious than the doctor first thought.
奥斯汀的病较医生原来以为的更严重。

doctrine n. 教条，学说
例句：We naturally associate the name of Darwin with the doctrine of evolution.
我们很自然地把达尔文的名字和进化论联系在一起。

diploma n．文凭，毕业证书，证明权力、特权，荣誊等的 证书，奖状
例句：The diploma is very important for Alan to get the job.
对艾伦来说，要得到那份工作，文凭是很重要的。

diplomatic adj. 外交的，老练的
例句：Those two countries have broken off diplomatic relations again.
那两个国家再次终止了交往。