乱局背后，有几个因素在暗隐发力，包括消费者对于肥胖的日渐忧虑，围绕代糖所作的科研报告的结论触目惊心，以及农作物价格飙升等。
Several forces are at work: growing concern about obesity, alarming scientific reports about artificial sweeteners and soaring agricultural prices.
从总体上看，发达国家的非营利科研机构的税收政策主要包括：对非营利性科研机构的收入税收优惠政策、对捐赠者的税收优惠政策。
As a whole, the taxation policies of non-profit scientific research institutions in developed countries include the favorable taxation policies about their incomes and the donators.
受访者包括科研人士、商业精英、咨询顾问、作家、科技研发者以及网民。
The interviewees included scientific and technological researchers, commercial elites, consultants, writers and netizens.
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