The dam will stand 600 feet high.大坝将高达600英尺。A dam burst and flooded their villages.堤坝决口,淹没了他们的村庄。Building a dam here could have unforeseeable consequences for the environment.在这里修建水坝可能会对环境造成无法预料的后果。...
Chloroprene Rubber ( CR ) is an important variety among the synthetic rubber.氯丁橡胶 ( CR ) 是合成橡胶的重要品种之一.In the chloroprene rubber can be used as acid acceptor.在氯丁橡胶中可作为酸的接受体.The chloroprene rubber sheath is heat and oil re...