I. Meaning:
In vain means to waste your mind and not work hard. Specifically, it is used to describe that a person or a team has made a lot of efforts and painstaking efforts, but ultimately failed to achieve the expected goals or achieved nothing. This expression usually has a sense of helplessness or frustration, indicating that efforts have not been rewarded as they should be.
Second, the context application:
The word "in vain" can be used in different contexts. For example, in academic research, if a scholar spends a lot of time and energy on a subject, but ultimately fails to draw any meaningful conclusions or findings, he can describe this futile effort with half the effort.
In the commercial field, if a company invests a lot of money and resources to develop a new product, but the market response is not good or the expected income is not obtained, it can also be described as wasting effort.
Third, the extended meaning:
Besides literal meaning and contextual application, the word wasted effort can be extended to other meanings. For example, it can be used to describe things or plans that had good prospects and potential, but failed to achieve the expected goals or get due returns for some reason or condition. In this case, wasting one's efforts expresses a feeling of regret or regret.
Emotional expression in emotional expression, wasting one's efforts usually has a sense of helplessness or frustration. It means that some efforts have not been rewarded or gained, which makes people feel lost or depressed. This word can also be used to express a feeling of self-mockery or humor, for example, in some cases, someone expresses his futile efforts or efforts in a humorous way.
Fourth, summary:
In vain is a word with rich meaning and contextual application. It means to waste one's mind. It can be used to describe the situation that someone or a team has put in a lot of efforts and painstaking efforts, but ultimately failed to achieve the expected goals or achieved nothing. In different contexts, this word can be used in different ways and can be extended to other meanings and emotional expressions.