| 词汇 | polyethylene |
| 释义 | polyethylene noun[ U ] USuk /ˌpɒl.iˈeθ.əl.iːn/ us /ˌpɑː.liˈeθ.ə.liːn/(also mainly UKpolythene) a light, usually thin, soft plastic, often used for making bags or for keeping things dry or fresh: 聚乙烯 a polyethylene bag聚乙烯塑料袋 They covered the broken windows with sheets of polyethylene.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 polypropylene polystyrene polythene polyurethane polyvinyl chloride thermosetting uPVC vinyl vulcanization vulcanized Examples of polyethylenepolyethylene These were placed randomly in a tunnel covered with a black polyethylene mesh and equipped with a microsprinkler system controlled by an electronic humidity sensor. Also, opaque polyethylene film does not effectively suppress nutsedge unless a soil fumigant has been applied. The trap interior contains an 18 cm polyethylene funnel which is suspended beneath the drainpipe by four chains. However, the use of polyethylene mulch has several limitations and disadvantages. In crops which experienced heavy rain, application of a synthetic fruit-set hormone enhanced fruit numbers as did the simple transparent polyethylene rain shelters. Each stem was carefully covered with a polyethylene bag before it was cut to avoid adult bugs from escaping. For chemical analysis, the soil was air dried and stored in polyethylene bags at room temperature. Direct measurement of polyethylene glycol induced depletion attraction between lipid bilayers. Non-permeable polymers such as polyvinylidine and polyethylene can be macerating to normal skin. These nets consisted of black polyethylene hanging 10 to 20 cm above the crop. Growing peppers on polyethylene and hairy vetch mulches. Effect of solar heating of soils by transparent polyethylene mulching on their chemical properties. The air blast was administered via 4-mm internal diameter polyethylene tubing, which was secured with a flexible cord around the child's neck. Two-liter polyethylene collection bottles were used and kept in freezers in the participants' residences in order to ensure stability of cortisol. The balloon was 4-6 cm in length (made from the finger of a latex glove), attached to polyethylene tubing. 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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