Following the mold of the other English Roundup series, Yang Ming-tu\’s volume on Natural Sciences & Technology is a very practical aid to English Vocabulary building. Each unit provides a conversational context for a related group of words and reinforces this with substitution drills. The topics covered range from such things as chemistry, astronomy, accoustics, mechanical engineering to building, farming and geometry. These act as interesting and informative introductions to many technical areas. Besides, the text ix peppered with appealing and colorful quotes and illustrations. Sll together it is a fun and educational book that will help the learner of English.