A: Commercial research will always leave important questions unanswered, because, for example, people who manufacture drugs will never pay for trials of non-drug treatments.
答：商业研究总会要遗留一些重要问题，原因在于，例如，制造药物的人绝不会为非药物治疗试验买单。
3
Compared with other cancer treatments, HIFU application has the unique advantages of being non-invasive, capable of precise tumour targeting and is coupled with very few side effects.