双专业是学生在修读主修专业的同时，（在同一学科门类或不同学科门类中）修读其它专业作为第二专业。
双专业课程 Double Majors ; Combined Degrees
双专业开发 double-major development
专业双杯竞赛 Audi Professional Twin Cup
奥迪专业双杯竞赛 Audi Professional Twin Cup ; Audi Twin-Cup
双外语专业教学 dual foreign languages teaching
双修专业 Joint Honours
双重专业化 double specilization
专业双泵电动吸奶器 professional double pump electric breast pump
对于第二个问题，我用另外三个词来回答：双语、双专业和多能。
For the second question, I would answer in another three words: bilingual, bi-major and multi-competence.
所以选择双语学习、双专业学习才能使得大家多能，才能不同于他人。
So bilingual and bi-major make you different and special from other students of foreign languages.
约翰对人与动物认知极限和能力的迷恋，已经促使他修了哲学和心理学的双专业。
John's fascination with the human animal's epistemic limits and capabilities has led him to a double major in philosophy and psychology.
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