繁殖的

Acquired immunity relies on the long-term survival of sensitized T and B memory cells, which can

后天免疫仰赖致敏记忆B细胞和T细胞的长期存活，它们能在同一病原体再度感染时快速繁殖。

Acquired immunity relies on the long-term survival of sensitized T and B memory cells, which can proliferate quickly upon reinfection by the same pathogen.

后天免疫仰赖致敏记忆B细胞和T细胞的长期存活，它们能在同一病原体再度感染时快速繁殖。

Buds can develop adventitiously on other parts of a plant and are sometimes a means of asexual reproduction.

芽可以在植物体的其他部分发生，不定芽有时也意味着一种无性繁殖。

It is a shame that this type of false advertizing is used to promote ones Breeding program.

我们致力于保护和维持BUGABOO血系之繁殖体系的高品质，使用虚假广告来达到宣传目的是一种耻辱。

This work is one of the most important bases of eliminating locusts. Studying the oogenesis of insects has important significance on demonstrating the reproductive mechanism and controlling locusts" fertility. At the same time, it"s an important means of studying the forecast of pests and the law of occurrence. It can reveal the law of ovipositing and explain the physiological basis of pests" occurrence, thus design "biorational insecticide.

研究昆虫的卵子发生对于阐明昆虫的生殖机理和控制繁殖具有重要的实践意义，是研究害虫预测预报和发生规律的一种重要手段，同时可以揭示昆虫大量产卵的规律，阐明害虫大发生的生理基础，从而设计出"生物合理的杀虫剂"，并为促进有益昆虫的大量繁殖提供理论依据。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

And nutrition at some stage may influence performance of sows of this stage,next stage and the whole reproductive cycle.

近年来，随着集约化生产的发展，高产仔母猪的营养需要和饲养管理已成为动物营养研究的新热点，有必要对其进行深入研究。1不同阶段妊娠母猪的饲喂母猪的繁殖性能与繁殖周期的各阶段营养密切相关，某一阶段的营养会影响此阶段、后一阶段乃至全程的生产性能(Johnston和Trottier，1999a)。

Quantitative exploration of population differentiation will benefit the utilization and improvement of wasp breeding; in-depth studies on the capability of avoiding superparasitism, host selection and adaptability of Trichogramma populations collected from different localities and hosts can produce some conclusions significant to Trichogramma application; studies on ovipositional behaviors are important for breeding improvement; co-parasitism is a common behavior among egg-parasitoids, and also an important factor affecting artificial rearing and field release; observations on inter-specific competition are helpful for choosing the most competitive natural enemies. This dissertation treated of the pragmatic aspects of the diagnostic system, i.

赤眼蜂种群分化的定量研究有利于蜂种及其品系的利用和改良；对采自不同地域和不同寄主的赤眼蜂种群的寄主选择、避免过寄生的能力及其适应性等进行深入细致的研究，可以得到一些对赤眼蜂应用有意义的结论；研究赤眼蜂的产卵行为对改进其繁殖和利用具有重要意义；共寄生是卵寄生蜂的一种常见现象，也是影响赤眼蜂人工繁殖和田间应用的重要因素；赤眼蜂种间竞争行为研究可以遴选竞争力最强的天敌。

With increasing altitude,pollen numberdecreased and length of stylar ramification increased gradually.Increased stylarramification of plants of Saussurea with increasing altitude has importantadaptive significance of evolutionary ecology.It ensured sexsual reproductivesuccess,provided a foundation of hereditary variation and increased specificdiversity.In addition,asexsual reproduction of most species of Saussurea assuredindividual quantity.

根据我们调查，生活在青藏高原东缘的多数风毛菊属植物都具有无性繁殖方式，它保证了风毛菊属植物物种的个体数量，而花柱分枝的变长保证了风毛菊属植物的有性繁殖成功，为风毛菊属植物在该地区的进化提供了遗传变异的基础，增加了风毛菊属植物的物种多样性，使得风毛菊属植物的多数物种都成为该地区的常见种，也可能是青藏高原地区是风毛菊属植物的现代分布中心的原因之一。19。

This work is one of the most important bases of eliminating locusts. Studying the oogenesis of insects has important significance on demonstrating the reproductive mechanism and controlling locusts" fertility. At the same time, it"s an important means of studying the forecast of pests and the law of occurrence. It can reveal the law of ovipositing and explain the physiological basis of pests" occurrence, thus design "biorational insecticide.

研究昆虫的卵子发生对于阐明昆虫的生殖机理和控制繁殖具有重要的实践意义，是研究害虫预测预报和发生规律的一种重要手段，同时可以揭示昆虫大量产卵的规律，阐明害虫大发生的生理基础，从而设计出&生物合理的杀虫剂&，并为促进有益昆虫的大量繁殖提供理论依据。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。