1, class is extended from "class" to mean that students attend classes together, and it can also mean "(a class)".

Tom was late for school and missed the first class.

Tom was late and didn't go to the first class.

2. Class hours mainly refer to one class or the unit time of each class in the textbook.

The first lesson is taken from the Gospel of St. John.

The first passage of the Bible is selected from the Gospel of John.

3. Lectures refer to lectures.

She glanced over her notes before the lecture.

She glanced over the lecture notes before giving the lecture.

4. A course refers to a complete course taught or studied in a period of time.

She took a course in philosophy.

She took a course in philosophy.

5. Project refers to a series of courses in the school.

For example, Kathy registered for a graduate program in journalism.

Kathy has gone to study for a master's degree, which requires a series of courses.

Second, the pronunciation is different.

1 and the English pronunciation of the course is [ks]; The American pronunciation is [krs]. ?

The British pronunciation of 2.class is [klɑ? s]； American pronunciation is [kl? s].

3. The English pronunciation of the first lesson is ['lesn]; The American pronunciation is ['lesn]. ?

4. The English pronunciation of the lecture is ['lekt (r)]; The American pronunciation is ['lektr]. ?

5. The English pronunciation of the program is ['prɡr? m]； The American pronunciation is ['pro? ɡr？ m].？

Third, the word polysemy is different.

1, course as a noun means course; Lectures; Process; Route; A dish. As a verb, it means running through; Catch up; Run.

2. Class, as a noun, has hierarchical meaning; Class; Class; Class; Class; Class [biology]; & lt mouth > excellent manners. Being a verb means classification.

3. lesson has a class as a noun; Class, homework, schoolwork; An example, a model. Transitive verbs mean to teach, warn and condemn; Teach ... a lesson.

4. Lecture as a noun means lecture; Speech; speak As a verb, it expresses reprimand; Lectures; Teaching.

5. Program as a noun refers to a program; Plan; Procedures; Courses; Program list and transitive verb representation programming; Arrangement; Explain in detail.