Boron - substituted polyaromatic mesophase prepared by co - pyrolysis of a tar pitch with pyridine - borane complex under autogeneous pressure.以煤焦油沥青和吡啶硼烷为原料采用加压热缩聚工艺制备硼取代聚芳烃中间相沥青.A new syntan product prepared with tar p...
It includes the highest glimpses of mortal gladness : reunion, reconciliations , the bliss of lovers long parted.这包含对极大乐趣的显露,重聚, 和解, 久别重逢的恋人的狂喜.Tears are signs of gladness as well as of grief.眼泪标志着悲伤,同样也标志着快乐.We behold t...
Petty thieves have raided him and have beaten him to lose consciousness.小偷们袭击了他并把他打得不省人事.The writer often obfuscates the real issues with petty details.那作家常以细枝末节来混淆实质问题.Replenishing the Petty Cash Fund.备用金的补充.Your petty ...