七鳃鳗

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

Japanese lamprey is a Cyclostomata, lamprey head, lamprey Branch, lamprey genus.

答：日本鳗是一种圆口纲，七鳃鳗头，鳗科，七鳃鳗属。

Primitive fishes, such as hagfish and lampreys, use suctionlike mouths to attach to the outer surface of other fish and suck out nutrients.

原始鱼类，诸如八目鳗类鱼及七鳃鳗，用有如吸盘一样嘴来吸附在别的鱼类的体表并吸取营养。

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

Having the form of a thin plate or lamella.

与七鳃鳗区别开的八目鳗类鱼。

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

Primitive jawless aquatic vertebrate: lampreys; hagfishes.

原始的无颚脊椎动物；七鳃鳗；八目鳗类鱼。

Extant jawless vertebrates, represented by lampreys and hagfishes, have innate immune receptors with variable domains structurally resembling T/B-cell receptors. However, they lack cardinal elements of adaptive immunity shared by all jawed vertebrates: T/B-cell receptors and major histocompatibility complex molecules.

在以七鳃鳗和盲鳗为代表的无颌类脊椎动物中，虽然发现了与有颌类脊椎动物T细胞受体(T-cell receptors， TLRs)、B细胞受体(B-cell receptors， BCRs)可变区具有相似结构的先天性免疫受体，却从未发现有颌类脊椎动物适应性免疫系统的核心组分：TCRs、BCRs、组织相容性复合体(Major histocompatibility complex， MHC)。

Very possibly the same will happen with this book, and it isn't just the colugos and tree shrews. The position of tarsiers (Rendezvous 7), and the grouping of lampreys with hagfishes (Rendezvous 22) are unsure. The affinities of the afrotheres (Rendezvous 13) and the coelacanths (Rendezvous 19) are still slightly unsure. The ordering of our rendezvous with cnidarians and ctenophores (Rendezvous 28 and 29) could be the wrong way round.

很可能本书也会同病相怜，这不仅仅是因为猫猴和树鼩——跗猴的位置（见第7纪），以及七鳃鳗和八目鳗类鱼的分组（见第22纪）尚不能确定；远古非洲哺乳动物（见第13纪）和腔棘鱼类（见第19纪）的亲缘关系也有待商榷；而我们在刺丝胞动物和栉水母类（见第28纪和第29纪）章节的编排上也许也是一个错误。

Hagfishes as distinguished from lampreys.

与七鳃鳗区别开的八目鳗类鱼。

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％。