无鳃的

Checking bivalves by microscope, the respiratory system was hurt, especially on lamina.

通过显微镜观察，漂白粉和氯杀宁的主要作用部位为背角无齿蚌的呼吸系统，在其鳃上可见明显病变。

Any of various primitive aquatic vertebrates of the class Cyclostomata,lacking jaws and including the lampreys and hagfishes.

鳗类，鳗无颚的各种原始水生圆口纲脊椎动物中的一种，包括七鳃鳗和盲鳗

Fairy shrimp:any of various transparent freshwater crustaceans of the order anostraca that lack a carapace and characteristically swim upside-down.

"仙虾：透明的淡水鳃足类的任何一种，无甲壳并且倒置游动。"

Fairy shrimp:any of various transparent freshwater crustaceans of the order anostraca that lack a carapace and characteristically swim upside-down .

"仙虾：透明的淡水鳃足类的任何一种，无甲壳并且倒置游动。"他会把这个城市搞得翻天复地的。

Included here are fishes having either a bony skeleton, such as a perch, or a cartilaginous skeleton, such as a shark, or those lacking a jaw, such as a lamprey or hagfish.

以具有鳍及用腮呼吸为特征的一种冷血水上脊椎动物，包括多骨骼鱼类，如河鲈；或软骨鱼类，如鲨鱼；或无颚鱼类，如七鳃鳗或八目鳗类鱼

All along peoples pay extensive attention on the origin and evolution of adaptive immunity system. Agnathans, taking lamprey as the representative, are generally thought at the edge of evolving the adaptive immunity system.

适应性免疫系统的起源与进化问题一直是人们研究的热点，以七鳃鳗为代表的无颌类脊椎动物，被普遍认为处在进化出适应性免疫系统的边缘。

Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.

七鳃鳗，八目鳗一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无颌的吮吸嘴，嘴内有锉牙

Fairy shrimp:any of various transparent freshwater crustaceans of the order anostraca that lack a carapace and characteristically swim upside-down.

&仙虾：透明的淡水鳃足类的任何一种，无甲壳并且倒置游动。&

Primitive jawless aquatic vertebrate: lampreys; hagfishes.

原始的无颚脊椎动物；七鳃鳗；八目鳗类鱼。

Purple Nudibranch、A lavender-colorednudibranch feeds on hydroids near Vatu-i-Ra, Fiji.

斐济附近的紫色祼鳃动物，这些无壳的软体动物通常都拥有非常鲜艳的颜色

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。