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交替

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A strong cycle of alternating booms and slumps has affected all types of development.

一个涨跌交替的有力周期已经影响了各种类型的发展。

The spore-producing individual or phase in the life cycle of a plant having alternation of generations.

在一种植物的生命周期中产生孢子的个体或阶段,从而引起了一代代的交替

Plants also differ from fungi in having a regular alternation of diploid and haploid generations.

植物与真菌的区别还在于植物具有规律性的世代交替

In plants and algae that undergo alternation of generations, a gametophyte is the multicellular structure, or phase, that is haploid, containing a single set of chromosomes, and has its own information on genetic expression.

在植物世代交替的生活史中,配子体是产生配子和具有单倍数染色体的植物体,并且有自己的遗传表达信息。

Diplobiontic Describing life cycles showing a typical alternation of generations with haploid and diploid somatic bodies.

异型世代:具有典型的单倍体和二倍体世代交替的生活史的现象。

Access to a large number of Chinese and foreign literatures, this text summarized the life cycle of aphids including anholocyclic type, heteroecious holocyclic type and antoecious holocyclic type, and the important biological characteristics including alternation of generations, difference of hibernation and polymorphism, it offered the theory basic of comprehensive prevention and control.

通过查阅大量的中外文献,对蚜虫生活周期的不全周期生活史、全周期同寄主生活史和全周期异寄主生活史进行了阐述,归纳出蚜虫生活周期中的世代交替、越冬方式的差异、多型现象几个主要生物学特点,为蚜虫的科学控制提供一定的参考价值。

In plants that undergo ALTERNATION OF GENERATIONS, spores are produced by meiosis by the sporophyte generation, so are usually haploid; they germinate to produce the haploid gametophyte generation.

在具有世代交替的植物体中,由孢子体世代进行减数分裂产生孢子,因此多为单倍体。它们将发育为单倍体的配子体世代。

In organisms showing ALTERNATION OF GENERATIONS, the gametes may be produced by mitosis in the haploid generation, or by meiosis in the diploid generation and give rise directly to gametes or gamete-producing cells.

在表现出明显世代交替的生物体中,配子可能是由单倍体世代发生有丝分裂产生,亦可由二倍体世代减数分裂直接产生配子体或配子母细胞。

A division of nonflowering plants characterized by rhizoids rather than true roots and having little or no organized vascular tissue and showing alternation of generations between gamete-bearing forms and spore-bearing forms; comprises true mosses and liverworts and hornworts.

无花植物的一个亚部,以假根而非真根为特点,有小的或没有维管组织,有结合体和孢子体的世代交替;由苔藓类组成。

Plantae in the part of the green algae, must Most red algae and brown algae, all higher plants (including mosses, ferns, naked child, and angiosperms) and all have alternation of generations life cycle.

植物界中的部分绿藻、绝大多数红藻和褐藻、全部高等植物(包括苔藓、蕨类、裸子和被子植物)的生活史均具有世代交替

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。