When his master's off traveling, Caleb stays with Pierre's parents.凯莱布在主人外出旅行时与皮埃尔的父母住在一起。We have a beautiful city and we pray it stays that way.我们的城市很美丽，但愿它能保持下去。She always stays cool, calm and collected in a ...
the mainspring of a reform movement改革运动的主要推动力Her jealousy is the mainspring of the novel's plot.这部小说情节中贯穿了她的忌妒之心.My life has been music, and a constant search for it has been the mainspring of my life...我以音乐为生，对音乐的不...