| 词汇 | polypropylene |
| 释义 | polypropylene noun[ U ] uk /ˌpɒl.ɪˈprəʊ.pə.liːn/ us /ˌpɑː.lɪˈproʊ.pə.liːn/ a type of plastic used for many purposes, such as food packaging, making ropes, and making artificial fabrics聚丙烯 Plastics & rubber Bakelite bioplastic Bubble Wrap Cellophane celluloid injection moulding latex Lucite melamine microbeads polyethylene polystyrene polythene polyurethane polyvinyl chloride thermosetting uPVC vinyl vulcanization vulcanized Examples of polypropylenepolypropylene The grids were constructed from polypropylene, a material which floats in water. The seedlings were covered with polypropylene tops to promote seed germination. In addition, all injection molded par ts are assumed to be polypropylene, all metal bases are aluminum, and all heating plates are steel. The gas transfer has been maximised by careful use of the blood/gas configuration features (respectively around and inside the hollow polypropylene fibre). Samples were collected in clean (washed with 5% hydrochloric acid and rinsed five to ten times with deionized water) polypropylene bottles. Two types of surface are currently used in dairy factories: stainless steel and polypropylene sheets. They were transported from the field in polypropylene bags and shaded from direct sunlight with a canvas screen. Longitudinal arteriotomy was carried out, and 4 interrupted mattress sutures of 4-0 polypropylene were used to close the fistula. The coronary artery was then closed longitudinally with 4-0 polypropylene running suture. Aliquots of plasma were immediately pipetted into 1.5 ml conical polypropylene tubes, capped and frozen until hormone analysis. They were housed in polypropylene cages in a temperaturecontrolled room. The dilated aneurysmal portion of the atrium was resected and the remainder of the atrial wall was closed with a continuous suture of 5-0 polypropylene. Funnel mouths were covered with polypropylene mesh (0.2 cm mesh size) to exclude litter and insects. For drought, plants were covered with polypropylene until harvest, while irrigated plants were watered when the soil moisture reached a level of 60% of field capacity. Each cage was made of polypropylene 33 15 13 cm and had a stainless steel wire lid on top which held a water bottle and commercial rodent chow. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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