1. The raceway beside the old mill. 
   旧磨房旁的赛跑
2. assays of cellular immunity 
   细胞免疫检测法
3. An artificial channel built to transport water and use its energy; a raceway. 
   人工水道建设以输送水源或利用其能量的人工沟渠；水道
4. Two-way charges for cellular phones 
   移动电话双向收费
5. The cellular construction of a beehive; the cellular nature of plant and animal tissue. 
   蜂窝状细胞结构；动植物组织的细胞状特性

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