The use of animals in scientific research remains a controversial issue.

在科学研究中使用动物仍然是一个有争议的问题。

同一单元的其他句子

• The rapid development of technology has transformed the way we communicate.技术的快速发展改变了我们的沟通方式。
• Many students struggle to balance academic work and extracurricular activities.许多学生难以平衡学业和课外活动。
• Is it more important to focus on economic growth or environmental protection?关注经济增长还是环境保护更重要？
• Governments should invest more in renewable energy sources to combat climate change.政府应该投资更多可再生能源以应对气候变化。
• The advantages of globalization are often overshadowed by its negative impacts on local cultures.全球化的优势常常被其对当地文化的负面影响所掩盖。