Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries. But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles7. Experts say more investment in research is needed to better understand these risks.
注释:
1. beauty product:美容产品
2. quantum dot :量子点。可取代传统染色法,成为细胞内的突光标记物,可进行长时间、多分子、同时检测。
3. give off:放出;发出
4. Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecule.研究人员正在研究为它们编程的方法,以便如果有靶分子存在时能通过发光辨认疾病。light up点灯;发光。targeted molecule:靶分子。
5. National Institutes of Health :国立卫生研究院
6. side effect:副作用
7. compared to larger particles:如果与大一点的颗粒比较起来的话。这是一个过去分词短语,作条件状语。
练习:
1. Which of the following uses of nanotechnology is NOT mentioned in the passage?
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