科学家已经鉴定出造成走味的瓶装啤酒带点苦的回味的化学物质。
Scientists have identified the chemicals that lead to the bitter aftertaste of stale bottled beer.
他们鉴定出四种不同的含铅物质，其中两种是人工合成的，并非天然物质。
They identified four different lead-based substances, two of which were man-made, not natural.
他们鉴定出56种物质造成啤酒的苦味，包括5种主要导致啤酒放久后的难闻味道的物质。
They identified 56 substances that contribute to beer's bitter taste, including five that appear to be largely responsible for its harsh flavour after ageing.
应用推荐