因这种碱化土壤的改良难度较大，而目前从事此项工作的研究的又很少，使这相当数量的土地被常期撩荒。

Because It is more difficult to be improved and now the study for alkaline soil is also few, much land is long abandoned.

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木粉的碱化处理使复合材料的弯曲强度和弯曲模量分别下降20。

Alkaline treatment of wood flour makes flexural strength and flexural modulus of the composite decrease by 20.

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You can do that by gently adding heat and making it basic, but you make the two DNA strands separate.

你可以通过逐渐加温并使之碱化的方法,使双链DNA解旋

耶鲁公开课 - 生物医学工程探索课程节选