This is an enlarged and revised version of the first 1983 edition. With 40,000 terms supplement, this book contains 120,000 scientific terms of mathematics, physics, chemistry and chemical engineering, astronomy, geoscience, biology, radio-electronics, electric engineering, calculating technology, civil engineering, mechanical engineering, metallurgy, automation, forestry, agronomy, and medical sciences. Common-used terms of bundling and interdisciplinary sciences, are added in this edition. All terms are arranged in Chinese phonetic alphabet order.