He sagged wearily back in his chair.他疲倦地瘫坐到椅子上。Morrison took the news badly and from then on his spirits noticeably sagged.这消息对莫里森打击很大，从那以后，他明显萎靡不振。His upper lip was flat, but the lower one sagged.他上唇扁平，下唇耷拉。There were p...
It is to be hoped that he is merely drumming up business.但愿他只是在招揽生意。the steady drumming of the rain on the tin roof雨点打在铁皮屋顶上发出的有节奏的嗒嗒声He pointed up to the roof, through which the steady drumming of rain could be heard.他向...
Water - borne polyurethane is the predominant material of membrane pressing adhesive.水性 聚氨酯是真空吸塑胶的主要成分.The water - borne polyurethane was based on polyester diol and toluene diisocyanate etc.以聚酯多元醇、甲苯二异氰酸酯为主要原料合成了 水性 聚氨酯...