分子生物学的新技术使最近的工作成为可能，这种新技术能在环境中检测到低浓度的病毒 DNA。
The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment.
使用这种新技术的工作效率有多高？
本文介绍了这种新技术固有的潜在能力和缺陷。
You'll learn about both the potential and the pitfalls inherent to this new technology.
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