有性生殖

Sagitta and L. virgaurea were suppressed due to interspecific competitions on the grassland, therefore the reproduction of the two plants mainly dependen on seeds.

箭叶橐吾和黄帚橐吾，在自然条件下，其克隆生长的根状茎，受到了草场其它生物的竞争而被抑制，主要进行有性生殖。

In sexual reproduction season, the foliage gradually decomposed, leaving only the base; and from the base of the re-tender the breeding of new schools, a strong self-fertility.

在有性生殖季节之后，枝叶就慢慢腐烂，只剩下基部；并从基部再滋生新嫩校，自我繁殖力很强。

For example, an asexual mutant arising in a sexual population occupies a niche frozen to that of its parental genotype because the asexual descendants are genetically self-identical.

。但往往其它条件是不同的，在这种情况下，与产生雄性所固有的双倍代价相比，有性生殖的实现适合度代价要小得多。

There are two main hypotheses which explain how sex may act to remove deleterious genes from the genome.

解释有性生殖如何起到从基因组中消除有害基因的作用，主要有两种假设。

Union of sperm and egg in sexual reproduction.

有性生殖中精子和卵子的结合。

The union of the sperm and egg in sexual reproduction .

有性生殖中精子和卵子的结合。

The necessity to repair genetic damage is one of the leading theories explaining the origin of sexual reproduction.

需要修复遗传损伤是解释有性生殖起源的一个最主要的推测。

Most of the endangered plant has the difficulty in sexual reproduction.

大多数的濒危植物都存在有性生殖障碍，通过对珙桐的大小孢子及雌雄配子体形成的研究，发现在这一过程没有异常。

The potential of sexual reproduction in the three species was still very great.

可见三种橐吾有性生殖的潜力依然很大。

The ascospores, on the other hand, are produced by following sexual reproduction.

另一方面，子囊孢子是在有性生殖之后产生的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。