演讲既是一门科学也是一门艺术Speech is as a science as an art.Speech is a sort of science as well as a sort of art.
演讲既是一门科学也是一门艺术 英语翻译用“as...as...”表示。A lecture is a subject/discipline of science as well as a school/discipline of arts.school/discipline: 学科的量词，一门学科的“门”
演讲既是一门科学也是一门艺术 英语翻译用“as...as...”表示Speech is as a science as an art.
Speech is a sort of science as well as a sort of art.