bacterial contamination短语¹⁴⁴⁹⁷²⁺² 基本例句 细菌污染 Objective: To determine the bacterial/span> contamination of disposable sanitary chopsticts and bamboo chopsticts, and compare whether there is difference between them in the bacterial contamination. 目的：检测一次性使用筷子与普通筷子上的细菌污染情况，比较两者有无差别。 cnki