A mule is a cross between a mare and a donkey.

骡子是雌驴的种。

A tiglon is a cross between a lion and a tiger.

虎狮是狮子老虎的种。

The less common cross of a female ass and a male horse is called a hinny.

母野驴的情况不多，生出的是驴骡，体比一般骡小。

The kind of mating, using as one parent a known homozygous recessive, is called a testcross.

这种即利用一个已知的纯合的隐性作为一个亲本的，称为测。

Objective To investigate the feasibility of applying immunohistochemistry (IH) and in situ hybridization (ISH) technique to the undecalcified bone sections.

探讨在低温塑料包埋制备的不脱钙骨切上运用免疫组化原位技术的可行性。

"There was a view that hybridisation was bad, and 'pure' species were good," says James Mallet of University College London.

英国伦敦大学学院的詹姆斯·拉特说, “有一种看法认为是不良的，而纯种才是“优良的。”

Based on the years experiences, the author summarized and provided the main criterion and technique measures for improved cytoplasmic male sterile monogerm hybrid sugarbeet of seed reproduction.

摘要总结了多年雄性不育甜菜单胚种的良种繁育实践经验，对该类品种的良种繁育主要原则技术措施进行探讨。

Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids.

完全在同一种群内进行的个体比以两个方向进行的个体繁殖后代要多，因此为了产生无生机的种，就要消耗掉一些配子。

Definition: Whole or cut, dried bark of Cinchona pubescens Vahl (Cinchona succirubra Pavon), of C. calisaya (Weddell), of C. ledgeriana (Moens ex Trimen) or of its varieties or hybrids.

本品为茜草科植物柔毛金鸡纳（鸡纳树）Cinchona pubescens Vahl (Cinchona succirubra Pavon)、白金鸡纳树C. calisaya (Weddell)、金鸡纳树C. ledgeriana (Moens ex Trimen)及其变种及品种的完整或切段的干燥树皮。