PTELook at the text below. In 35 seconds, you must read this text aloud as naturally and clearly as possible. You have 35 seconds to read aloud.

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Biodegradable polymers have been used as carriers in drug delivery systems for more than four decades. Early work used crude natural materials for particle fabrication, whereas more recent work has utilized synthetic polymers. The commercial success of these polymers has led to further research in the field aimed at bringing forward new formulation types for improved delivery of various small molecule and biologic drugs.

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