您要查找的是不是：
- 土dust
- 土的terrene
- 土人native
- 土黄色Khaki
- 史密斯先生是法学博士。Mr. Smith is a Doctor of Laws.
- 挖土excavation
- 他在聚精会神地写他的博士论文。He was involved in writing his doctoral dissertation.
- 填土filling
- 他获得了哲学博士学位。He earned his doctorate in philosophy.
- 膨润土swell soil
- 哈迪博士是俱乐部的创始会员之一。Dr Hardy was a founder member of the club.
- 土狼hyena
- 为了准备博士论文，他博览群书。He was learned in books for the preparation of his doctoral dissertation.
- 岩土工程Geotechnical Engineering
- 民法学博士Juris Civilis Doctor
- 松土scarification
- 土工geotechnique
- 覆土to earth up
- 回填土backfill
- 土石流earth flow
