1. This essay is a most conscientious piece of work.
    这篇论文是精雕细刻的工作.

2. In time, it became an accepted fact that the Cox brothers employed a conscientious ghost that did most of their work for them.
    随着时间的流逝，考科斯兄弟雇了一个尽心尽责的鬼，他们家的活大部分都让鬼给干了，这件事成了公认的事实。