用泛性质定义了BCI -代数的直积，并证明了直积的存在性和唯一性。
The concept direct products of BCI-Algebra by using the universal property is introduced and uniqueness and existence of direct products of BCI-Alegbra are also proved.
下面引入的某些热性质定义和传热理论的初步概念都不准备作无止境的论述。
The following definition to thermal properties and introduction to the theory of heat transfer are not intended to give an exhaustive treatise of these subjects.
本文给出紧致度量空间逐点伪轨跟踪性质的定义，该定义是伪轨跟踪性质定义的推广。
In this paper, the pointwise pseudo-orbit tracing property is defined on a compact metric space, and it is a generalization of pseudo-orbit tracing property.
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