送葬的队伍缓缓地穿过肃静的街道.The funeral made its way slowly through the silent streets.这间旧房子非常肃静.The old house was quite silent.要求所有应试者保持考场肃静.Silence is required of all examination candidates....
本文报道2, 4-二氨基 -6- 取代哌哗嗪基喹唑啉衍生物的合成及其抗疟活性.A series of 2, 4 - diamino - 6 - substituted piperazine quinazolines was synthesized.本公司主要经营各种硫化染料,硫化染料, 2.4-二氨基甲苯等等.Our company mainly engaged in all kinds of Sulfur Dyes Sulfur Dy...