| 词汇 | polythene |
| 释义 | polythene noun[ U ] mainly UKuk /ˈpɒl.ɪ.θiːn/ us /ˈpɑː.lɪ.θiːn/(US usuallypolyethylene) a light, usually thin, soft plastic, often used for making bags or for keeping things dry or fresh: 聚乙烯 a polythene bag聚乙烯塑料袋 They covered the broken windows with sheets of polythene.他们用塑料薄膜把打坏的窗户挡起来。 Plastics & rubber Bakelite bioplastic Bubble Wrap Cellophane celluloid injection moulding latex Lucite melamine microbeads polyethylene polypropylene polystyrene polyurethane polyvinyl chloride thermosetting uPVC vinyl vulcanization vulcanized Examples of polythenepolythene He adopted the use of old polythene for all further compost baskets he made. The four replicate beakers of similar treatment solution were placed in a small plastic tray which was then kept in a tightly closed polythene bag. All samples were immediately enclosed in polythene bags to prevent dehydration and brought to the laboratory. Large polythene bags were used to pot seedlings from the start to avoid transplanting into larger pots during the experimental period. Leaf samples were immediately brought to the laboratory in polythene bags. The dishes were stacked in plastic trays with a saturated cloth above and below, enclosed in a polythene bag. This pressure enhancement can be further increased by using low density polymer foam in place of normal polythene. The stocking was put in a polythene bag fixed to the trap through a similar tubing, 20 cm long. A sheet of clean polythene was placed beneath the cage at the beginning of the day. Each sample was placed in a black polythene bag which was then labelled, sealed and transported to the laboratory. Heat losses above the plate were minimized by covering the matrix with chromatography paper, a sheet of black polythene and a triple-glazed lid. Samples were stored in sealed polythene bags and kept in a cold store prior to processing. The seedlings were incoculated with compatible rhizobia in polythene tubes in a nursery before being delivered to the farms. The remaining five pats in each group were placed directly into polythene bags. For dehydration, six or seven equal aliquots of seeds were placed in polythene bags with an equal weight of freshly regenerated silica gel desiccant. 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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