至于微量元素混合物产生的影响，人们对此知之甚少，但此类混合物会引发更深远的健康问题。
The effects of mixtures of trace elements are poorly understood and could cause further health concerns.
强化型谷类混合物，如小麦-大豆混合粉和玉米-大豆混合粉，是良好的微量元素来源。
Fortified cereal blends, such as wheat-soya blend and corn-soya blend, are good sources of micronutrients.
为此，采取了向配水井、贮泥池内投加微量元素混合液的措施，从而解决了污泥膨胀的问题。
Therefore throw to add trace element to match well and store mud pool, so the problem of sludge bulking is solved.
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