背部

Origin, developmental changes and homologies of the stage morphostructures were considered according to their location in three morphogenetic fields. The first, or central, field forms at the prodissoconch I stage. It can be inherited by prodissoconch II and nepioconch stages in one taxa, or PD-II, N and dissoconch stages in others. The second, or postero-dorsal, field appears at the N stage, and the third field, or antero-dorsal, at the D stage.

主要对3个形态发生区域的阶段形态结构的起源、发育变化和同源性做了研究，其一，即中央区域，开始形成于前双壳I期，在某个分类单元它可以在前双壳II期和幼贝期形成，而在其它分类单元则在前双壳II期、幼贝期和双壳期形成；第二区域，即背部后区，在幼贝期出现；第三区域，即背部前区，出现于双壳期。

Origin, developmental changes and homologies of the stage morphostructures were considered according to their location in three morphogenetic fields. The first, or central, field forms at the prodissoconch Ⅰ stage. It can be inherited by prodissoconch Ⅱ and nepioconch stages in one taxa, or PD-Ⅱ, N and dissoconch stages in others.

其一，即中央区域，开始形成于前双壳Ⅰ期，在某个分类单元它可以在前双壳Ⅱ期和幼贝期形成，而在其它分类单元则在前双壳Ⅱ期、幼贝期和双壳期形成；第二区域，即背部后区，在幼贝期出现；第三区域，即背部前区，出现于双壳期。

The posterior portion of the trunk of the human body between the neck and the pelvis; the dorsum.

背部：人体躯干的后部，在脖子和骨盆之间；背部

Back:The posterior portion of the trunk of the human body between the neck and the pelvis; the dorsum.

背部：人体躯干的后部，在脖子和骨盆之间；背部。

The dorsal system is necessary for the development of ventral structures including the mesoderm and neurogenic ectoderm.

背部基因中的突变可以阻止腹部结构的出现，并且胚胎的腹部变得背部化。

Although overexpression of Hspa5 does not cause detectable defects, its knockdown by injecting Hspa5 morpholino antisense oligonucleotides results in slower epiboly during gastrulation and dorsalized phenotypes at 24 hpf, including smaller and curled tail and absence of caudal ventral fin. When Hspa5 expresison in embryos is knockdown, the expression of the dorsal markers gsc and ntl is enhanced while the expression of ventral markers is reduced.

尽管在胚胎中过量表达Hspa5对胚胎发育没有明显影响，但是利用反义吗啉环寡核苷酸抑制胚胎中Hspa5的表达会导致胚胎外包变得缓慢，24hpf出现尾部变细或卷曲、缺少腹鳍等背部化的表型，同时gsc和ntl等背部标记基因的表达增强，但eve1等腹部标记基因的表达减弱。

Undertake back kowtows attack nurse knock at a back to nurse can pass pair of bosom back to section law shakes, indirect ground makes adhere to at pulmonary alveolus all round, the phlegmy fluid of bronchus wall becomes loose, fall off, easily expectorate.

三、进行背部叩击护理叩背护理可通过对胸背部有节律震动，间接地使附着于肺泡四周、支气管壁的痰液松动、脱落，易于咳出。

In saddle marked dogs, the saddle covers the back of the neck, back, sides and up the tail. A saddle may be blue, black, liver, or varying shades of grizzle.

在用鞍标记的犬，躯体上有鞍座般的黑色记号，覆盖于颈背部、背部、尾部两侧和上侧，鞍座的颜色可能为蓝色、黑色、红褐色或灰色。

There is feathering along the back of the front legs and along the back of the thighs, giving a "pantaloon" effect.

沿著前腿背部至后腿背部的丰厚披毛，看起来像是穿了宽松的长裤般。

If you work your chest and not your back, you will have a hard time maintaining good posture as your pectoral muscles overpower your back muscles and pull your shoulders forward.

如果你的工作不是你的胸部和背部，你将很难保持良好的姿势为您的胸肌压倒你的背部肌肉拉肩膀前入。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。