囊状幼虫

The snail was found to have an indirect developmental type in the early development. The fertilized eggs were oval-shaped and discoidal cleavage. Embryonic development stages were divided into cleavage, blastula, gastrulae, trochophore, and intra-membrane veliger. Larval development stages included veliger, late veliger and crawling larvae metamorphosed to juvenile.

结果表明：黄口荔枝螺卵囊高度平均为7.33 mm，卵粒数量平均为165粒；黄口荔枝螺的早期发育属间接发生型，受精卵呈椭圆形，卵裂为盘状卵裂；在卵囊内，胚胎发育包括卵裂期、囊胚期、原肠胚、膜内担轮幼虫、膜内面盘幼虫；幼虫发育包括面盘幼虫、后期面盘幼虫和匍匐幼虫。

The giant jellyfish exhibit two types of reproduction, one is asexual reproduction, including fertilized eggs, planula, scyphistoma, podocyst, strobila and ephyra; the other is sexual reproduction, including medusa or jellyfish, typically solitary, pelagic.

大型水母的生活史中有明显的世代交替现象，受精卵，浮浪幼虫，螅状体，足囊，横裂体到碟状体的幼体发育阶段属无性世代，幼蜇发育到成蜇阶段属有性世代。

Primitive marine animal having a saclike unsegmented body and a urochord conspicuous in the larva.

有囊状不分段形状身体的原始海洋动物，幼虫阶段有明显的脊索。

The result showed that the Chinese scabrood virus was a novel strain of honeybee Sacbrood virus.

该病毒株为一种新型的蜜蜂囊状幼虫病病毒株。

Compared with Sacbrood virus, the nuc leotide sequence of the fragment was 86.8%identical and the amino-acid sequen ce deduced from the nucleotide sequence shared 93.4%identity.

序列分 析表明，该片段为中蜂囊状幼虫病病毒部分结构蛋白基因，与意蜂幼虫囊状病病毒结构蛋白基因序列的同源性为86.8%，与之对应氨基酸序列的同源性高达93.4%。

Encysted saclike larva of the tapeworm .

被包在囊内的囊状的绦虫幼虫。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。