1·The heat stability of modified PE in the surface materials of heat shrinkable articles reinforced by glass fiber was studied by means of TGA, TGA-IR.
通过热重、红外-热重联机对纤维增强热收缩制品的表面基材改性聚乙烯的热稳定性进行了研究。
2·The scope of application, superiority, safety measures and maintenance of buried PE gas pipe are discussed with an engineering practice in Jilin City.
结合吉林市的工程实际，论述了燃气用埋地聚乙烯管的适用范围、优越性、安全措施和维修。
3·Be suitable for the buried, underground and pipeline systems with PE and metal wraparound sleeves of all size.
适用于所有尺寸的聚乙烯和金属护套电缆的架空、直埋和管道系统。
4·By testing the MFR of silane grafted PE with different preservation time, and the surface condition and the gel content of the silane grafted extrudates with different retention time in extruder.
测试不同储存时间下的硅烷接枝聚乙烯的熔体流动速率和硅烷交联聚乙烯电缆料在挤出机中停留不同时间后挤出物的表面状况、凝胶含量等。
5·The factors of flammability testing of no-halogen flame-retardant PE were investigated by testing methods of the oxygen index and the smoke density.
采用氧指数和烟密度分析方法，对无卤阻燃聚乙烯试样燃烧性能测试的影响因素进行了分析。
1·PE is my favorite class.
体育课是我最喜爱的课程。
2·We have PE on Tuesday.
星期二我们有体育课。
3·Today's classes are maths, Chinese, English and PE.
今天有数学课，语文课，英语课和体育课。
4·Kids at the two other schools - one in a village near Plymouth and the other an urban school - got just 2.4 hours and 1.7 hours of PE per week, respectively.
另外两所学校的孩子们——一所在普利茅斯附近的一个小村子里，另一所是城市学校——每周分别只上2.4小时和1.7小时体育课。
5·What games did you play in PE?
或是“你在今天的体育课上玩的什么呀？”