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For decades, researchers have worried about rising mercury levels in Arctic animals, such as seals, beluga whales, and Arctic char.
几十年来，研究者们一直担心北极动物，如海豹，白鲸，汞水平，北极红点鲑等动物的含汞量增加。
Each pending request will include the following information about the request (limit by char).
每个未决请求包含该请求的如下信息(限制为char型)。
The char yield for cellulose, xylan and lignin decreases with temperature rise, and finally closes to a constant value about 1.5%, 22% and 26%.
三组分热裂解焦炭产量随温度升高而降低，最终纤维素热裂解焦炭产量为1.5%，而木聚糖和木质素分别为22%和26%。
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