轮形的

But if that theory is correct then bdelloid rotifers, freshwater invertebrates that haven't had sex in at least 30 million years, should have been parasited into extinction long ago.

但是如果这个理论是正确的，那么蛭形轮虫（一种淡水无脊椎动物，它已经无性繁殖至少3000万年了）应该在很早以前就被寄生虫消灭了。

Few creatures—even bacteria—do without sex entirely, but bdelloid rotifers are among that minority.

很少有生物是完全的无性繁殖，连细菌也不是，但蛭形轮虫却属于这个少数群体。

And they found that bdelloid rotifers can shake the infection by drying out, drifting away and then rehydrating once they land someplace moist but fungus-free.

他们发现蛭形轮虫能够通过自身风干，然后飘走来摆脱细菌，等降落到潮湿而没有细菌的地方后，它们会再次补水。

Bdelloid rotifers (pronounced DELL -- oyd ROWtiff-ers) are tiny, freshwater invertebrates that have long puzzled scientists because, as completely asexual animals, they should have been extinguished by parasites and pathogens long ago in evolutionary time.

蛭形轮虫这种细小的淡水无脊动物已经困扰科学家们很长时间了，因为作为一种无性生殖动物他们在进化中早就应该因为寄生虫和病原体而灭亡了。

Bulb tunic brown; inner filaments basally ca. 2 × as wide as outer ones, distally abruptly subulate; ovary with concave nectaries at base covered by hoodlike projections

鳞茎皮棕色；内轮花丝约基部2 *和外部的一样宽，上部突然钻形；子房具凹陷蜜穴在基部被钩状突起覆盖 88 ALLIUM korolkowii 褐皮韭

Herbs annual or perennial. Leaves in whorls of 3 or 4, elliptic to lanceolate, pinnatisect to pinnatifid.

一年生或多年生草本叶3轮生或4，椭圆形到披针形，羽状全裂的到羽状半裂。

Stamens 5, persistent; anthers longitudinally dehiscent or more rarely poricidal; staminodes in 1-3 whorls, spatulate to petaloid, sometimes fused in a tube.

雄蕊5，宿存；花药纵向开裂或更很少的孔裂；退化雄蕊成1-3轮，匙形到瓣状，有时愈合为筒。

We are professional manufacture wheel and flower-shaped impeller hundred manufacturers.

本厂是专业生产制造花形页轮和百叶轮的厂家。

Leaves 3, in a terminal whorl, sessile or shortly petiolate, rhombic-orbicular to ovate, with 3 or 5 main veins and anastomosing veinlets.

叶3，在一顶生轮生，无梗或具短叶柄，菱形圆形到卵形，具3或5主脉和网结的细脉。

The appearance of color can be based on user demand, multi-color paint, matt, light and orange-shaped surface has a high middle and low casters for you to choose from, not limited to quantity, from Units 1 to do, no mold charges, so you have to open mode with the same effect .

外观色彩可根据用户需求，喷涂多色，亚光，亮光及桔形表面，有高中低档脚轮供您选择，数量不限，一台起做，无需模具费，让您拥有与开模同等的效果。

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