The basic "lack of demands," contains four levels of the pyramid, they are physiological needs, security needs, social needs and the needs of self-esteem.
而基本的“缺失性需求”包含了金字塔五个层次里的底四层，它们分别是生理需求、安全需求、社交的需要和自尊的需求。
Based on the analysis of four publicly published papers in chemical academic periodicals both at home and abroad, it also discusses the composition, basic demands and skills in writing EST papers.
系统分析了化学科技英语论文翻译和写作在词汇和句法两个方面的基本特点。
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