| 1. | Truth lies at the bottom of a well .
真理潜伏在井底（极难发现）。 |
| 2. | Truth is at the bottom of a well .
真理潜伏在井底（极难发现）。 |
| 3. | The old man was extremely difficult to get along with .
这个老人极难相与。 |
| 4. | It would be a questionable technique .
这种技巧极难掌握。 |
| 5. | It is extremely difficult to reproduce this type of contact .
这种接触方式极难重现。 |
| 6. | Travel to the planetary systems of other stars is a much more formidable undertaking .
要航行到其他恒星的行星系中去是件极难实现的事。 |
| 7. | Graphite and even its linear counterpart, poly(p-phenylene) are too insoluble .
石墨甚至其线性类似物，聚（名聚-苯撑）都是极难溶解的。 |
| 8. | Unless this is done, it is extremely difficult to determine whether or not people's economic well-being is actually increasing .
除非做到了这一点，否则极难断定人民的经济幸福是否真的增进。 |
| 9. | D . she belongs to those who are very difficult to satisfy
她属于那种极难讨好的人。 |
| 10. | Truth lies at the bottom of a well
真理潜伏在井底（极难发现） 。 |
