This paper reviews geochemical characters, distribution, modes of occurrence and migration of Ni in coal.
本文综述了镍的地球化学特征，以及煤中镍的分布、赋存状态与迁移规律。
Reviews the current situation of the geochemistry characteristics, distribution, modes of occurrence, mechanism of concentration, migration of chromium in coals.
对煤中铬的地球化学行为、分布、赋存形式、富集机理、迁移规律等方面的研究现状进行了综述。
Purpose to research roles of genetic factors on occurrence of migraine without aura and hereditary modes of the disorder.
目的探讨遗传因素在普通型偏头痛发生中的作用及该病的遗传方式。
However, the order of occurrence of the evaluative categories was found to be the same in both narrative modes and both memorized narrative modes.
然而，评价性范畴的出现顺序在直接叙事模型与记忆叙事模型中是一样的。
The research results can provide the experiment method and data for the occurrence modes of fluorine in coal.
研究结果可为煤中氟赋存形态的研究提供试验方法与依据。
The fractional extraction on Longkou lignite by different solvent was used for the studying of the occurrence modes and the variations of small molecular phases in coal.
研究煤萃取后的小分子相的赋存方式及其变化规律，用不同溶剂对龙口褐煤进行了分级萃取。
Failure modes: Consider the occurrence of an apparent large drop in engine oil pressure.
失效模式：发动机油压的明显大幅下降发生。
Failure modes: Consider the occurrence of an apparent large drop in engine oil pressure.
失效模式：发动机油压的明显大幅下降发生。
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