预富集
pre───abbr.炼油工程师（PetroleumRefiningEngineer）
enrichment───n.丰富；改进；肥沃；发财致富
enrichment definition───浓缩定义
enrichment week───浓缩周
uranium enrichment───[核]铀浓缩
pre reading───adj.阅读前的
pre out───前输出
pre pay───vt.预付；提前缴纳
enrichment studies───富集研究
One symptom of the hurried child syndrome is forcing pre-school children to constantly take classes and perform other "enrichment" exercises to help them prepare for school.───忙碌儿童综合症的症状之一就是强迫学龄前儿童不断参加各种班和特长培训，以帮助他们为入学做好准备。
pre-school enrichment programmes to give young children an educational head start;───学前增益课程，为幼儿提供教育起步；
Composition pre-enrichment broth: double strength BPW with vancomycin, malachite green, and milk.───成分：含万古霉素，孔雀绿和奶的双效BPW。
Composition pre-enrichment broth: double strength BPW with vancomycin, malachite green, and milk.───预富集培养基成分：含万古霉素，孔雀绿和奶的双效BPW。
Microbiology - General guidance for the detection of Enterobacteriaceae with pre-enrichment───预浓缩肠杆菌族检验的一般指南
Cold atomic absorption spectrometry determination of trace mercury in water after pre-enrichment───预富集-冷原子吸收光谱法测定水中的痕量汞