您要查找的是不是：
- L-D循环L-D cycle
- 循环loop
- 循环的circulatory
- 良性循环virtuous circle
- L/D比L/D ratio
- 血液循环blood circulation
- 循环经济recycling economy
- L-D算法L-D algorithm
- 循环水recirculated water
- 维生素Dvitamin(e)
- 循环利用cyclic utilization
- 循环使用periodic duty
- d-L前缀码d-L prefix code
- 循环泵recycle pump
- D－L命名体系D-L system of nomenclature
- 死循环endless loop
- 循环地circularly
- D-,L-乳酸Lactic acid
- 再循环recycle
- 水循环water cycle
