The shop assistant received me indifferently while leaning on a counter.商店售货员靠在柜台上漫不经心地招呼我。After I paid the money, the shop assistant gave me a receipt.我付过钱之后, 店员便给了我一张发票.The shop assistant was wearing a white overall.那店...
Papain - catalyzed synthesis of aspartame precursor Z - APM in biphasic solvent system wasinvestigated.本文报道在两相溶剂体系中利用木瓜蛋白酶催化合成Aspartame前体Z - APM的研究.And now I think of it, aspartame is the tip of a considerable iceberg.并且...