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During the study, researchers recorded the width of the tree rings of balsam firs. Each ring marked a year of the tree's growth. A narrow ring indicated that the tree's growth had been suppressed that year. The narrow rings appeared only after wolf populations decreased, allowing a greater number of moose to survive and eat more balsam firs.

研究期间,研究人员记录了香脂冷杉树轮的密度,一个树轮表示树生长了一年,有一圈年轮显示出树木在那一年的生长受到了阻碍,根据树的年轮推断出现阻碍的这一年,正是狼群数量减少,鹿的数量大量繁殖的那一年,鹿比平常吃了更多香脂冷杉。

Although none of Darwin's children had obvious documented physical or mental deformities, the three who died appear to have suffered from infectious disease, which is more likely to be contracted in those with higher levels of inbreeding, Berra and his colleagues noted.

Berra和他的同事们提出,虽然达尔文的孩子中没有任何明显记录在案的身体或心理上的畸形,那三个死去的孩子却是由于传染性疾病死亡的,而高度近亲繁殖的后代更容易染上这样的病。

Therefore, the appearance of macroscopic algae not only improved the environment and played an essential support for the growth and propagation of the metazoan which depended on oxygen, but also provided a new food source that served as a new basis in the ecosystem for metazoans evolution and development.

因此,陡山沱期的宏体植物不仅改善了环境,为依赖一定氧而生活、生长和繁殖的后生动物给予了必要的支持,而且作为生态系统中的必要基础,为宏体后生动物的快速发展和演化提供了一个新的食物源。

They started with 15 to 40 different pure strains of algae and microscopic animals, and added these one at a time in various combinations and sequences to a large flask. After 10 to 15 days, if all went well, the aquatic mixture formed a stable, self-reproducing slime ecology -- a distinctive mix of species surviving off of each other.

他们从15至40种不同的单一水藻植株和微生物入手,依次把这些物种以不同的组合形式及先后顺序放入一个大烧瓶。10到15天之后,如果一切进展顺利,水生植物的混合体就会形成稳定的自行繁殖的湿地生态——相互依赖生存下来的与众不同的物种混合物。

But through has the actor\'s wig to the cover and does not cover two kind of processing Dactylopius confusus\'s bosom egg quantity dissection result analysis which the actor\'s wig grows naturally to be possible to know,grain\'s reproduction way is the sexual reproduction,and is through spawns the hatching,but is not the viviparity.

而通过对罩有网纱进行单雌饲(来源:AdfBCd7论文网www.abclunwen.com)养和不罩网纱雌雄自然种群混合饲养的两种处理的胭脂虫的怀卵量的解剖结果分析可知,胭脂虫的生殖方式是两性生殖,并且是通过产卵繁殖的,而不是卵胎生。

In the artist's own words, 'this piece of work has cut a complete graphic image into pieces and then got copied, torn apart, reintegrated and mobilized: an endless game, an not so fascinating illusion, a large monogenesis life form keep self-generating, keep copying, without gender, without history, without memory'.

艺术家本人形容这件作品时说&将完整的图像切割,拷贝,撕裂,重组,使其运动起来……是一个无休止的游戏,一种不太美妙的幻觉,一个单性繁殖的巨大的生命体在不断自我生长,相互复制,没有性别,没有历史,没有记忆。&

The photograph of the painting reproduces the colors of the original extremely well.

这幅画的照片绝妙地再现了原作的色彩。adj。生殖的,繁殖的;复制的

In order to break through the traditional aquarium tank requires frequent water exchange limitations, our factory also offers tailor-made ecological fluid, can guarantee the water quality of the long-term stability, but also effective bactericidal, at the same time have a suitable water, grass, fish breeding grounds for bacteria have to maintain the Aquarium of the ecological balance of the murals inside.

为了突破传统柜式水族箱需要经常换水的局限,我厂还提供特制的生态液,能保证水质的长期稳定,还能有效杀菌,同时产生适合水、草、鱼儿繁殖的有益菌,保持了水族壁画箱内的生态平衡。

Whenever two or three dog fanciers get together there is almost sure to be talk about line breeding.

Brackett 博士在他的《计划育种》一文中说的那样:每当两三个犬友聚在一起的时候,那几乎谈论的是关于系统繁殖的话题。

To be honest: our system of regional exclusive rights make it easier to fight illegal propagation. The last years we have tried together with other breeders to convince key parties in China that PBR is necessary in order to increase investment in China.

老实说呢,我们的区域专属权系统处理非法繁殖的工作更容易进行,过去几年来我们和其他育种公司尽力希望中国官方能了解品种保护的重要性,提高品种保护对于国外园艺公司增加投资中国的行动,绝对是必要的项目。

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推荐网络例句

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。