When one comes to more tractable land at lower altitudes, problems of permanent pasture improvement are not nearly so difficult . 在海拔较低的易于耕作的土地上，改进永久草场的问题并不很困难。
The cost of living is so high. it'll be difficult for her to take the responsibility. she'd better think the whole thing over . 生活费用这么高，负起这个责任对她来说很困难，她最好再好好想想。
Celia had met such people before; it was always hard to involve them in a thoughtful, objective conversation . 西莉亚过去碰到过这种人，让他们一起坐下来，进行深思熟虑，平心静气的谈话总是很困难。
During periods when exchange rates stayed fixed for many years, central banks found it hard to tighten (or loosen) credit . 在多年来汇率保持固定的时期中，各国中央银行发现要紧缩（或放宽）信贷很困难。
Since injection density cannot be varied independently, it is difficult to show conclusively its effect on combustion stability . 由于不可能独立地改变喷射密度，要确定地指出喷射密度对燃烧稳定性的影响是很困难的。
They found little difficulty, however, in agreeing upon who were the great and near-great presidents and which ones had been failures . 不过他们发现对于谁是伟大或者近乎伟大的总统，谁是不中用的总统这一层，彼此要达到意见一致，并不很困难。
2 it ' s difficult to track on animal on rainy days 在雨天要追踪动物时很困难的。
It is often difficult to find wood for the fire 通常去找到木柴烧火是很困难的。
I found it difficult to reach the top of the mountain 我发现要爬到山顶很困难。
It ' s difficult to recruit teachers of quality 要聘请到素质好的老师是很困难的。
