They walked in companionable silence.他们默默地走着,很友好.He was confiding , good - natured, unsophisticated, companionable.他为人坦率,一团和气, 世故不深, 蔼然可亲.He was turning on her a glance of the companionable and persuasive manner.他以友好、殷勤的...
戴夫背部拉伤，几乎没法踢球。Dave pulled a back muscle and could barely kick the ball.感觉一下腰背部皮肤的柔滑。Feel how soft the skin is in the small of the back.我的胳膊很累，背部肌肉紧绷得难受。My arms are tired, and my back is tense....
以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...