Coffee also contains trigonelline, an antibacterial compound that not only gives it a wonderful aroma but may be a factor in preventing dental caries.
咖啡还含有葫芦巴碱，这是一种抗菌的化合物，它不仅提供良好的香气，而且可能是预防龋齿的一个因素。
The team has not yet identified the rejuvenating factor, but they have found a blood-borne compound that seems to promote brain aging.
他们还没有确定重新变年轻的因素，但是他们发现了一种血液中的化合物似乎会促进大脑衰老。
But they wanted to pinpoint the precise factor in curcumin, which is a complex compound.
但他们想查明姜黄素中确切的成分，因为姜黄素是一类混合成分。
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