The progresses in five - membered heterocyclic metallocene analogic complexes and their application in olefin polymerization are reviewed.综述了五元杂环类茂金属配合物的研究进展及其在烯烃聚合中的应用.One would expect strong and positive correlations b...
The old town centre is girdled by a boulevard lined with trees.一条林阴大道环绕古城的中心。The city is girdled about with gently rolling hills.该市为平缓起伏的丘陵所围绕著.People usually girdled lake with trees.人们通常用树来环绕湖水....
The stool had a torn, red plastic seat.那个凳子的红色塑料座面已经破旧不堪。He hoisted himself onto a high stool.他抬身坐上了一张高凳子。He perched on a tall stool by the bar.他坐在吧台前的高凳子上....
马蹄上套了皮套子，以免弄脏赛马场。Leather overshoes were put on the horses' hooves to stop them marking the turf.这位美丽的小姐感到每天去赛马场实在乏味.The beautiful girl found going every day a dull thing.他可能是让赛马场的赌金计算器迷住了.He might have been attached...