painstaking research

• 细心的研究

painstaking research的用法和样例：

例句

1. The skillful repair of fine lace entails slow and painstaking work.
   对精致花边的熟练修补需要缓慢而极度细心的工作。
2. The peasant economy is scattered, and the socialization of agriculture, judging by the Soviet Union's experience, will require a long time and painstaking work.
   农民的经济是分散的，根据苏联的经验，需要很长的时间和细心的工作，才能做到农业社会化。