包含 reciprocal cross 的英语例句 | 欧路词典例句词典

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.

采磁共振谱法测定了国产紫胶桐酸的优势象,结果表明,其分子中连二羟基处于反交。

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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?

相同的两个物种之间的互交结果往往会有如此大的差？

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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，互惠杂交的植物也是如此。

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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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