I. The English words for bachelor's degree, undergraduate, master's degree, and postgraduate are:
1. bachelor
Bachelor: English [?b?t?l?(r)], American [?b?t?l?, ?b.t.l?]
n. Bachelor; Bachelorette; Young male animal that has not yet been mated; Squire
例句：I got a Bachelor's degree after graduation.
2. Bachelor's degree undergraduate or Bachelor
undergraduate: English [?nd?gr?d?u?t], American [?nd?r.gr.d.u.t]
n. (not having received a bachelor's degree) a college student, a college undergraduate;
adj. college student 的，大学的
例句：Aren't I a bit long in the tooth to start being an undergraduate?Aren't I a bit too old to go to undergraduate school now?
3. mastermaster
master: English [?mɑ:st?(r)], American [?m?st?(r)]
n. master; master (especially a male); guru; a male teacher
vt. to become proficient in, to become skilled at; to act as a master of, to be the master of...; to subdue; to dry ( dyed articles)
adj. main; master's; proficient, excellent; original
Example sentence: I've a master's in economics. I earned a master's degree in economics.
4. Postgraduate.
postgraduate: English [?p?st?gr?d?u?t], American [?po?st?gr?d?u?t]
adj. of postgraduate students;
n. graduate student
Example sentence: I didn't put down that I had postgraduate degree.I didn't put that I had a master's degree.
2. Undergraduate can mean either a college student (in school, i.e., undergraduate) or a college dropout. So undergraduate doesn't just mean a student who has not graduated, it can also mean an undergraduate who is enrolled in school.
Expanded information:
In addition to bachelor's and master's degrees, there are also doctorates and post-doctorates:
1. Doctor Doctor
English [?d?kt?(r)], American [?dɑkt?(r)]
n. doctor, great doctor; doctor; theologian; medical equipment
vt. & vi. medical treatment, practice of medicine;
vt. repair, assemble; fake; adulterate; modify, trim
Example sentence: The degree of Doctor of Philosophy is awarded to him.
2. Post Doctorate
English ['p?std'?kt?r?t], American ['p?std'?kt?r?t]
n.postdoctoral
Example sentence: As a post doctoral research assistant I worked in the field of cell biology. As a post doctoral research assistant I worked in the field of cell biology.
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