The UN were faced with an ignominious withdrawal or a long-term military presence.联合国要么选择不光彩地撤军，要么选择维持长期的驻军。It is an ignominious thing to attack others in the back.在别人背后下刀子是一件非常不光彩的事.The marriage was considered especiall...
简介氟树脂的种类和聚四氟乙烯的发现经过.Sorts of fluororesins and the discovery of polytetrafluoroethylene are introduced.液晶容器的内表面上可以包括一含氟树脂.An inside surface of the liquid crystal container may include a fluorine resin.聚全氟乙丙烯是一种重要新型氟树脂产品,本...