1. According to (author/source), (quote or statement).
例句：According to a recent study, people who exercise regularly have a lower risk of heart disease.
2. (Quote or statement), as (author/source) points out.
例句："The best way to predict your future is to create it," as Abraham Lincoln points out.
3. In the words of (author/source), (quote or statement).
例句：In the words of Mahatma Gandhi, "Be the change you wish to see in the world."
4. It is often said that (quote or statement).
例句：It is often said that laughter is the best medicine.
5. As (author/source) argues/asserts/claims, (quote or statement).
例句：As Dr. Martin Luther King Jr. argued, "Injustice anywhere is a threat to justice everywhere."
6. (Quote or statement) is a view shared by many (experts/scholars/analysts).
例句：The idea that climate change is caused by human activity is a view shared by many scientists.
7. Many people believe that (quote or statement).
例句：Many people believe that the key to happiness is to live in the present moment.
8. (Author/source) contends that (quote or statement).
例句：Stephen Hawking contends that time travel is theoretically possible.
9. It has been suggested/proposed that (quote or statement).
例句：It has been suggested that eating a balanced diet can help prevent chronic diseases.
10. In recent years, there has been growing interest/concern/attention to (topic), as (author/source) notes/observes.
例句：In recent years, there has been growing concern about the impact of social media on mental health, as numerous studies have noted.