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单词 reciprocal cross
例句
英语例句库

Nuclear magnetic resonance techniques are used to determine the national aleutric acid preferential conformation. The results show that the dithionic hydroxyl radicals are in reciprocal cross bearing.

采用核磁共振谱法测定了国产紫胶桐酸的优势构象,结果表明,其分子中连二羟基处于反交叉位。

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原声例句
物种起源

Why should there often be so great a difference in the result of a reciprocal cross between the same two species?

为什么相同的两个物种之间的互交结果往往会有如此大的差异?

物种起源

Hybrid plants produced from a reciprocal cross generally resemble each other closely, and so it is with mongrel plants from a reciprocal cross.

由互惠杂交产生的杂交植物通常彼此非常相似, 来自互惠杂交的植物也是如此。

物种起源

By a reciprocal cross between two species, I mean the case, for instance, of a female-ass being first crossed by a stallion, and then a mare by a male-ass: these two species may then be said to have been reciprocally crossed.

所谓两个物种之间的相互杂交, 我指的是母驴首先与种马杂交,然后母马与公驴杂交的情况:这两个物种可以说是相互杂交的.

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