聽寫填空,只寫填空內(nèi)容,不抄全文,5個(gè)左右的句子,不用寫標(biāo)號(hào),注意標(biāo)點(diǎn),口語(yǔ)中因結(jié)巴等問題造成的重復(fù)單詞只寫一遍~

Joseph DeSimone: One of the challenges with a solid tumor like pancreatic tumors, is that not too much of the drug gets actually into the tumor.

You are listening to chemist Joseph DeSimone of the University of North Carolina at Chapel Hill. [---1---]

Joesph DeSimone: [---2---]

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Joseph DeSimone: [---4---] And once we convey that liquid to a solid, it becomes a particle.

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Joseph DeSimone: [---6---]

Our thanks today to the Camille and Henry Dreyfus Foundation. ES, is a clear voice for science. We're at

【視聽版科學(xué)小組榮譽(yù)出品】
Using nanotechnology, DeSimone has developed a way to engineer drug particles, so they target only diseased regions of the body and avoid healthy cells. Where particles go in the body is a strong function of their size and shape. DeSimone is altering both the size and shape of drug particles using strips of silicon, which he likened to very tiny, that is, nano-sized, ice cube trays. And what we're able to do now is fill the cavities of that ice cube tray-like structure with liquids that are going to be the precursors to medicines. When the particles are harvested from the trays, he said, they can be used therapeutically. And putting them in the bloodstream and using them to target cancer cells or maybe we make them a little bit bigger so they can be inhaled, and this opens up whole sorts of new approaches for the treatment of variety of different diseases.