I. Interpretation
In vain, the definition is: empty self-toil, ineffective efforts.
Second, evolution.
In vain, the original meaning means in vain, with no result. With the evolution of time, the meaning gradually expands, which can be used to describe any meaningless or fruitless effort. In modern Chinese, futility has been given more meanings, such as "futility" and "futility", which are used to describe those situations that have made great efforts but have not been rewarded in the end.
Third, the definition of word combinations
1, futility: refers to futility, no result, no gain.
2, in vain: refers to the labor in vain without results, did not achieve the expected purpose.
3, in vain: refers to doing something meaningless, wasting time and energy.
4, in vain: refers to hard work but did not get the due reward, did not achieve any results.
5, in vain: refers to doing meaningless things, did not achieve the expected purpose, no harvest.
An example of futility
1, fitness lies make it futile to lose weight, and the body will not consume so many calories after getting used to some kind of exercise.
Grandma and I went to the library to borrow books, but we didn't borrow books all morning. This is in vain!
People have long been tired of him. For him, all hope is in vain.
Maybe you feel that your efforts are always in vain, but there is no doubt that you are getting closer and closer to success every day.
During the summer vacation, Kelly's brother took me fishing, and I didn't even catch a small fish for a long time. This is in vain!
In order to supply raw materials, he went to many places, and the result was a futile round trip, which has not been solved yet.
7. He used kung fu on a hypothesis that had long been proved to be untenable. As a result, it was useless to carve ice.
8. This practice of sneaking into the bandits' cave alone is simply heroic and futile.
9. Xiaohong took out everything she could find at home in order to make handicrafts, but in the end she found that there was a key material missing, and her efforts could only be in vain.
10, this is because this trip is definitely a waste of time and I feel cold.