Formed through radiative cooling, the surface fog layer was followed by a cloud layer caused by lowlevel cold advection.
结果表明，此次雾过程首先由地面辐射冷却形成贴地雾层，而后因低空平流冷却形成低云。
The difficulties in purchasing foreign books are the inadequacy of effective purchasing information, the unreasonable prices of the books and the lowlevel service of supplement.
外文图书采购面临着缺乏有效采访信息、图书定价不合理及低水平的服务供给等困难。
The difficulties in purchasing foreign books are the inadequacy of effective purchasing information, the unreasonable prices of the books and the lowlevel service of supplement.
外文图书采购面临着缺乏有效采访信息、图书定价不合理及低水平的服务供给等困难。
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