The first lesson is as difficult as the last one.
第一课和最后一课一样难。
The English lesson today was so difficult that it went over my head.
今天的英文课太难，我无法了解。
Which lesson is the most difficult in Book Two?
第二册课本里哪课最难?。
The second lesson is more difficult than the first.
第二课比第一课难的多。
But, he always remembers the lesson that that difficult period of his life taught him.
但是，他记得最清楚的还是在他贫穷时的故事，和教训。
Which lesson is the most difficult in this book?
这本书里哪一课最难？
The last and most difficult lesson is lesson 14.
最后一课即最难的一课是第十四课。
The last and most difficult lesson is lesson 14.
最后一课即最难的一课是第十四课。
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