求翻译：选修课具有一定的实用性，这有利于学生自己选择自己感兴趣或对自己有用的课程，不仅能开阔了学生的视野，也便利与学生离开学校后的自我发展。是什么意思？

The elective course has a certain practicality, which is conducive to the students choose their own interest or their useful course, not only to broaden the vision of students, also facilitate self-development after students leave school.

Elective courses have a practical, which is conducive to students' own interest or choose your own courses for its own sake, not only to open the students' perspective, but also facilitate students leave the school with the self-development.

The elective course has certain usability, this is advantageous in student chooses oneself is interested or to the oneself useful curriculum, not only could widen student's field of vision, after also facilitated and the student leaves the school the self-development.

Elective courses have a certain usefulness, which helps students choose their courses of their useful or interesting, not only broaden the students ' horizons, facilities and students left the school of self development.

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