他们的发现可能预示着为某些类型的阳痿找到了医治方法。Their discovery could herald a cure for some forms of impotence.她在此刻出现预示着一场灾难。Her appearance at this moment is an omen of disaster.夏普的腿和肩膀开始疼痛,这预示着肯定要下雨了。Sharpe'sleg and shoulder began to a...
Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.六亚甲基二异氰酸酯 ( HMDI ) 可用在预聚物中代替甲苯二异氰酸酯〔TDI〕.Polyurethane elastomers based on glycols ( PEA, PPG PTMG ) , diisocyanate ( TDI ) and chain extender...