1. As far as I'm concerned, ... (就我来说...)
例句：As far as I'm concerned, learning a new language is a challenging but rewarding experience. (就我来说，学习一门新语言是一项具有挑战性但值得的经历。)
2. It goes without saying that... (不言而喻...)
例句：It goes without saying that a healthy lifestyle is essential for our well-being. (不言而喻的是，健康的生活方式对我们的健康至关重要。)
3. In other words, ... (换句话说...)
例句：In other words, the government needs to invest more in education to ensure a brighter future for the next generation. (换句话说，政府需要更多地投资于教育，以确保下一代更加美好的未来。)
4. It is widely believed that... (普遍相信...)
例句：It is widely believed that regular exercise can improve our physical and mental health. (普遍相信的是，定期锻炼可以改善我们的身体和心理健康。)
5. It is commonly known that... (众所周知...)
例句：It is commonly known that smoking is harmful to our health. (众所周知的是，吸烟对我们的健康有害。)
6. There is no doubt that... (毫无疑问...)
例句：There is no doubt that technology has transformed the way we live and work. (毫无疑问的是，科技已经改变了我们生活和工作的方式。)
7. It is worth mentioning that... (值得一提...)
例句：It is worth mentioning that volunteering can not only benefit others but also bring a sense of fulfillment to ourselves. (值得一提的是，志愿服务不仅可以造福他人，还可以给我们带来成就感。)
8. It should be noted that... (应该注意...)
例句：It should be noted that climate change is a global issue that requires collective action. (应该注意的是，气候变化是一个需要全球行动的问题。)
9. In conclusion, ... (总之...)
例句：In conclusion, we need to take action to protect the environment and preserve our planet for future generations. (总之，我们需要采取行动来保护环境，为子孙后代保存地球。)
10. All in all, ... (总的来说...)
例句：All in all, learning a foreign language can broaden our horizons and enhance our communication skills. (总的来说，学习一门外语可以拓宽我们的视野，提高我们的交际能力。)
11. To sum up, ... (总结起来...)
例句：To sum up, the key to success is hard work and perseverance. (总结起来，成功的关键是努力和毅力。)
12. It is not enough to... (仅仅...是不够的...)
例句：It is not enough to have a good education; we also need to have practical skills and experience to succeed in the real world. (仅仅拥有良好的教育是不够的，我们还需要在现实世界中拥有实践技能和经验才能成功。)
13. It is important to... (重要的是...)
例句：It is important to set goals and work towards achieving them in order to fulfill our potential. (重要的是设定目标并致力于实现它们，以充分发挥我们的潜力。)
14. It is crucial to... (至关重要的是...)
例句：It is crucial to take care of our mental health as well as our physical health. (至关重要的是，我们要照顾好我们的心理健康和身体健康。)
15. It is essential that... (必要的是...)
例句：It is essential that we take action to reduce our carbon footprint and combat climate change. (必要的是，我们要采取行动来减少我们的碳足迹并应对气候变化。)
16. It is critical that... (至关重要的是...)
例句：It is critical that we address the issue of income inequality in order to build a more just and equitable society. (至关重要的是，我们要解决收入不平等的问题，以建立一个更加公正和平等的社会。)
17. It is necessary to... (有必要...)
例句：It is necessary to invest in renewable energy sources to reduce our dependence on fossil fuels. (有必要投资于可再生能源，以减少我们对化石燃料的依赖。)
18. It is advisable to... (建议...)
例句：It is advisable to seek professional help if you are struggling with mental health issues. (建议如果你在处理心理健康问题方面遇到困难，寻求专业帮助。)
19. It is recommended that... (建议...)
例句：It is recommended that we eat a balanced diet and exercise regularly to maintain good health. (建议我们保持均衡饮食和定期锻炼以保持健康。)
20. It is better to... (最好...)
例句：It is better to be safe than sorry, so always wear a helmet when riding a bike. (最好安全第一，所以骑自行车时一定要戴头盔。)
21. It is easier said than done... (说起来容易做起来难...)
例句：It is easier said than done to quit smoking, but it is worth the effort for your health. (戒烟说起来容易做起来难，但为了您的健康，这是值得努力的。)
22. It is a common misconception that... (常见的误解是...)
例句：It is a common misconception that all Asians look alike, when in fact there is a great deal of diversity among Asian people. (常见的误解是所有亚洲人看起来都一样，事实上亚洲人之间存在很大的多样性。)
23. There are pros and cons to... (...有好处和坏处...)
例句：There are pros and cons to social media; while it can connect us with others, it can also be a source of negativity and distraction. (社交媒体有好处和坏处；虽然它可以让我们与他人联系，但也可能成为负面和分心的来源。)
24. It is a double-edged sword... (是一把双刃剑...)
例句：The internet is a double-edged sword; while it provides us with easy access to information, it can also be a source of misinformation and online harassment. (互联网是一把双刃剑；虽然它为我们提供了方便的获取信息的途径，但也可能成为误导信息和在线*扰的来源。)
25. It is a complex issue that... (是一个复杂的问题...)
例句：Climate change is a complex issue that requires a multifaceted solution involving government policy, technological innovations, and individual action. (气候变化是一个复杂的问题，需要政府政策、技术创新和个人行动等多方面的解决方案。)
