METHODS: The target compound was prepared by the bromination and amination reaction.方法: 用溴代及胺化反应合成了四甲基吡嗪衍生物.The effects of triacetoneamine concentration on hydrogenation and amination were discussed.论述了三丙酮胺纯度对加氢和还原胺化反应的影...
尤妮斯穿着浅绿色的衣服站在后面不起眼的地方。In the background, dressed in pale green, stood Eunice.这种对新神道的崇拜使巴比特迷惑不解, 他还怀疑尤妮斯抽烟.Babbitt was bewildered by this worship of new gods, and he suspected that Eunice smoked cigarettes.尤妮斯: 待我看看.那不是灰尘...
We ended with Blake's Jerusalem, accompanied on the organ by Herbert Wiseman.在赫伯特·怀斯曼的风琴伴奏下，我们演唱了布莱克的《耶路撒冷》作为终曲。A wiseman needs not blush for changing his purpose.智者不耻于改变初衷.A wiseman cares not for what he cannot hav...
...the unnecessarily strident tone of the President's remarks...总统发言中不必要的强硬语气He is a strident advocate of nuclear power.他是发展核能的坚定拥护者。She tried to laugh, and the sound was harsh and strident...她想笑，但声音听起来尖锐刺耳。She trie...
The area is of great botanical interest.这一领域有重大的植物学研究价值。His discovery was hailed as the botanical find of the century.他的发现被誉为本世纪植物学的最重大发现。Collect geological samples, faunal materials, botanical specimens, and sediments s...