本文还介绍了虚拟仪器的概念、构成和特点等，并简单介绍它的应用。
The paper briefly introduces the concept, constitutes, appliance and characteristic of Virtual Instruments.
由于地理和人口构成等因素，该县汉语方言具有混合型语言的特点。
Due to factors like geography and population composition, the dialects in this county are characteristic of a blending-mode language.
通过对铁矿山机修系统的工作性质、工艺特点和成本构成等的分析，揭示了目标成本管理在矿山机修的成本管理中推广应用的重要意义。
Through analysis of work nature, process features and cost composition, the important significance of target cost management to maintenance system of iron mine is narrated.
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