They were rare , and the pure - strain wild turkeys had begun to interbreed with farmers domestic stock.
纯种野火鸡已经和农户的家养火鸡混种，品种质量有所下降。
These formulae give us the stress and strain in a prismatic beam when it is subjected to pure bending .
当棱柱形梁受纯弯曲时，这些公式给出了它的主力和主变。
The effects of cyclic strain amplitude history and mean strain on the cyclic deformation behavior of pure copper were investigated.
揭示了紫铜在应变循环下的循环应变幅值历史、平均应变对循环特性的影响；
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