The relaps is the mainly characteristic and the leading problem of drug addiction.
复吸是药物成瘾的主要特征之一，也是治疗药物成瘾要解决的主要问题之一。
The culture for King Zhou to worship is mainly characteristic of offering sacrifices to ancestors.
周王祭礼文化独特特征是以祭祖为主。
The mainly characteristic of trapping materials is the trap depth. So it is significant to calculate the trap depth for the trapping materials.
表征陷阱材料的主要物理量是陷阱深度，准确计算出陷阱深度对于研究陷阱材料具有重要的意义。
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