Now chemists have developed a technique that identifies what kind of degradation process an old book or historical document is going through, based on the odors it gives off.

现在，化学家们研发出一种技术，这种技术基于旧书或是历史文档所散发出来的气味，能够鉴别出它们所经历的不同老化过程。

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Now chemists have developed a technique that identifies what kind of degradation process an old book or historical document is going through, based on the odors it gives off.

现在，化学家们研发出一种技术，这种技术基于旧书或是历史文档所散发出来的气味，能够鉴别出它们所经历的不同老化过程。

youdao