His coat was a somber brown.他的衣服是暗棕色的.He had a somber expression on his face.他面容忧郁.She was dressed in somber black.她穿一身灰黑色衣服.He was a post - impressionist painter whose early works somber, dark colors.他的早期作品说明他是一名后印象派画家....
As a sportsman, he is long past his sell-by date.作为一名运动员，他早已风光不再。The newspaper publishes a profile of a leading sportsman every week.该报每周刊登一篇关于一名优秀运动员的简介.His brother is a sportsman of our school.他弟弟是我校的运动员....
聚羟基乙酸的经典制备方法主要有两种:直接缩合聚合法和乙交酯开环聚合法.There are two means available for the preparation of PGA - synthesis polymerization and ring - opening polymerization....