这样的座椅不再是绿地上异质材料的介入，而是自然生态的延伸。

Such chairs are no longer interference of different materials in the green area, but the extension of natural ecology.

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在此基础上，分析了转动梯度对异质材料界面和固定边界性质的影响。

Thereby, the effects of rotation gradients on the interface of heterogeneous materials and the property of fixed boundaries are analyzed.

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对异质材料铁-镍点焊在不同规范下熔合过程进行了试验研究，包括可焊性及规范参数的选择。

The fusion course of different material (Fe and Ni)in spot weld with different process variable was researched. The weldableness and the selection of parameter were researched, too.

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