A Jack of all trades and master of none.是什么意思

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用法例句

Progress in the research of tripodal compounds with N as central atom;

氮支三脚架结构化合物研究简介

To study the coordinating relations between tripodal ligands and the fluorescent properties of rare earth ions and their complexes, a tripodal ligand,2,2,2-amine tri acetyl-pyridine and its 6 complexes with rare earth nitrates are synthesized.

为了研究三脚架型配体与其稀土配合物荧光性质的关系,合成了三脚架型配体——2,2,2-胺三乙酰-吡啶及其6种稀土配合物。

In order to study composition,compared probable coordination structure and fluorescence propertiesof tripodal and their rare earth complexes a tripodal compounds containing 2,2,2-amine tri-acetyl-benzylamine (L)and the its six rare earth complexes were synthesized which was characterized by IR,1H-NMR,elemental analysis,thermal analysis,molar conductivity,fluorescence spectrometry and so on.

为了研究三脚架型配体稀土配合物的组成、可能的配位状态及荧光性质,合成了三脚架型配体——2,2,2-胺三乙酰苯胺(L)及其6个稀土配合物。

This paper presents the dynamic modification and re-analysis of a tripod mount structure used in the machine gun.

在利用道特征灵敏度分析结果的基础上，对机枪三脚架支承结构作动力修改，获得了使结构固有频度达到预期改善时主要结构参数（敏感参数）的修改量。

This paper gives a relative sensitivity analysis method for predicting the dynamic modification of a tripod structure.

给出了预估三脚架结构动态修改方向的相对灵敏度分析方法,推导了三脚架结构的固有频率关于结构参数相对灵敏度的计算公式。