We certainly have not given up on formal methods, but we realize that they are still quite difficult to understand, require specialized knowledge, and do not have great tool support.
我们当然没有放弃正式的方法，但我们认识到，它们仍然是相当难以理解，需要专业的知识，而且没有很好的工具支持。
He says, "There are many things in Paul's letters very difficult to understand. And some people twist them to their own destruction as they do other kinds of scripture."
他说“保罗的书信里有很多，难以理解之处，而有些人曲解它们，这是自取沉沦，正如他们对待其他圣典一样。”
Some children feel it is very difficult to do their homework, because they can't understand their teacher clearly, and cannot follow their teacher's teaching process.
一些孩子觉得很难做作业了，因为他们无法理解他们的老师清楚地，并且不能跟他们老师的教学过程中。
The lady lived quite far away, difficult to reach and old. Only now do I understand that in a prosperous metropolis that such place existed.
婆婆住的地方很远，也很偏、很旧。我现在才知道，繁华的都市里居然还有这种地方。
If you do not like hot and sour taste of the cheese, you may be difficult to understand why some people get crazy like Stilton cheese.
如果你不喜欢酸辣口味的奶酪，那你可能很难理解为什么有人对斯蒂·尔顿奶酪喜爱得疯狂。
I understand if they are working hard and their portion is difficult, but sometimes a person can't do the assignment due to incompetence or laziness.
据我所知，如果他们正在努力和他们的部分是困难的，但有时一人不能做的转让，由于无能或懒惰。
Sure, I understand that the stewards have a difficult job to do and they have to take decisions that are not easy.
可以肯定，我理解赛事干事是一个很艰难的工作，他们要做出决定并不容易。
Sure, I understand that the stewards have a difficult job to do and they have to take decisions that are not easy.
可以肯定，我理解赛事干事是一个很艰难的工作，他们要做出决定并不容易。
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