- arched barrel roof筒形屋顶;
- barrel vaultn.桶形穹窿;
- barrel roof筒形屋顶;
- barrel rolln.（表演特技飞行中的）滚桶;
- barrel organn.手摇风琴筒风琴;
- barrel of cement桶装水泥;
- barrel button[计]柱形按钮;
- barrel organsn.手摇风琴筒风琴( barrel organ的名词复数 );
- put theory into practice将理论付诸实践
- theory of relativityn.相对论;
- theory of probability概率论;
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