...句(insert,update,delete),也不能读写远程包的变量 为了对包的公用函数加以限制,在定义包规范时,可以使用纯度级别(purity level)限制公用函数 语法:pragmarestrict_references (function_name,wnds[,wnps][,rnds][,rnps]); wnds:用于限制函数不能修改数据库数...
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These impurities if taken out can bring back the mental purity hence real spirit of joy of childhood can be attained up to an adequate level.
只有清除这些杂质才能回归精神纯洁，从而充分体会童年欢乐的真正含义。
Purity Protection System saves fuel, reduces the level of deterioration, maintains cleanliness in the engine, increases productivity and inter-service interval.
纯度保护系统可以节省燃油、降低恶化水平、保持发动机清洁、提高生产力并延长服务间的间隔。
The method is suitable for large-scale mutant bank screening as well as large mapping populations with characteristics of maintaining relatively high level of DNA purity and concentration.
该方法特别适用于精细作图群体和大型突变体库的筛选鉴定，不仅通量大、速度快，而且可以确保足够的DNA浓度和纯度。
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