左右两侧的两个大孔,分别表示进气阀孔和排气阀孔.The large holes on the left and right represent the inlet and exhausting valve ports respectively.结果: LSA-5B型大孔吸附树脂对莲心生物碱具有较大吸附量.Result: The LSA - 5 B macroporous adsorption resin prolided the opt...
我开车开了好一阵穿过这片可怕的空旷之地。I drove for a while across this fearsome emptiness.这附近略显阴冷空旷。It's a bit chilly and empty hereabouts.一种不自然的寂静和空旷笼罩着.An unnatural silence and desertion reigned there....
Glazes had been used from ancient times in Egypt.埃及自古代起就使用釉料.Especially indicated for glazes which contain lead and boron.尤其适用于含铅、含硼的釉药.It'serves as a red colorant for glass and glazes.还用作玻璃和釉面的着色剂....
另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.嘌呤为嘧啶取代或嘧啶为嘌呤所取代,叫做颠换.The substitution of a purine for a pyrimidine, or vice versa is a transversion.本文研究氟脲嘧啶(5—...
She resolved that, if Mimi forgot this promise, she would remind her.她决定，如果米米忘记了这个承诺，她就提醒她。Only Mimi's intimates were admitted to her boudoir.只有米米的密友才被允许进入她的闺房。Mimi had gotten over her pique at Susan's refusal ...