The exact inception of the use of poly tubes in the united states is unknown . 人們并不知道美國開始使用塑料管的確切時間。
Graphite and even its linear counterpart, poly (p-phenylene) are too insoluble, infusible, and brittle . 石墨甚至其線性物聚苯,過于不溶,不溶和發(fā)脆。
Water is collected in the 30ml poly bottles in the field and screw-capped ready for future treatment . 水樣用30毫升的聚乙烯瓶的野外采集,擰緊螺旋蓋以備進(jìn)一步處理。
Different alleles may be acquired within the inverted segment after the inversion poly morphism is established . 在倒位多形性形成后,在倒位的區(qū)段內(nèi)可能獲得不同的等位基因。
Study on harmful effects of poly - drug abuse (三)濫用多種藥物的禍害研究計劃;