写学术论文英文摘要时，通常需要包括以下内容：

1. 研究的背景：简要介绍您所研究的问题或主题的背景和意义。

2. 研究目的：阐述您的研究目的，表达您想要解决的问题或想要证明的观点。

3. 研究方法：描述您用来解决问题或测试假设的方法，包括实验、调查、模拟等。

4. 研究结果：阐述您所获得的主要结果和发现，这些结果需要与研究问题和目的相一致。

5. 结论：总结您的研究，强调其重要性和意义，并提出进一步研究的建议或展望。

下面是一个英文摘要的示例：

Title: The Influence of Social Media on College Students' Academic Performance

Abstract: With the rapid development of social media, an increasing number of college students are using social media platforms to communicate and share information. This study aims to investigate the influence of social media on college students' academic performance. By conducting a survey among 300 college students in China, the study finds that intensive use of social media is negatively correlated with students' academic performance. Moreover, students who use social media frequently are more likely to be distracted and experience lower levels of motivation and self-regulation. The findings suggest that college students should use social media wisely and that educators should raise awareness of the potential negative effects of social media use on academic performance.