不过检查管道生垢状况以及重新计算以核算帐目平衡也需要花上好几个月。
But inspection of furred-up pipes and recalculations to make the books balance can take months.
此外，一些洁齿防垢牙膏含有一些叫做三氯生能够杀死口腔中一些细菌的抗生素。
Additionally, some tartar control toothpastes contain an antibiotic called triclosan, which kills some of the bacteria in the mouth.
通过对垢物组成进行分析，发现原料焦化汽油中二烯烃缩合及胶质缩合生焦是垢物生成的主要原因。
By analyzing the fouling materials, it was found that coke formed by the condensation reactions of dienes and resin existed in the feed was the main component of the fouling materials.
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