聚丁二烯经一系列反应转变成丙啶基化合物 ( 聚丁二烯亚胺 ).Polybutadiene is changed to an aziridinyl compound ( polybutadieneimine ) by a series of reactions.丁二烯的衍生物,用于聚合制成氯丁橡胶.A synthetic rubber made from the polymerization of butadiene sodium.利用哈...
Economists warn that enormous pressures could build up, forcing people to emigrate westwards.经济学家警告，迫使人们向西部迁移的压力可能会增至很大的程度。They turned westward / westwards after crossing the river.他们过河以后向西拐了.He pushed his control westwa...
A new generation of scientists became fascinated by dinosaurs.新一代科学家对恐龙研究着了迷。Scientists know that cancer may not show up for many years.科学家们知道癌症可能会潜伏多年。Half of PML's scientists have first degrees, the other half hav...
Pale and black with false citrine, imperfect white and red.和错误的柠檬色, 有缺点的白色和红色的栅栏和黑色.Bank industry has great centrality and demonstrates the characteristics of imperfect competition.国内银行业集中度较高,具有垄断竞争的市场特征.That is, because...