The jellyfish absorbs oxygen through its ectoderm and can store it in the mesoglea.

水母通过外胚层吸收氧气，并将在中胶层中。

During fetal development, the entire body derives from three layers, called germ layers, the ectoderm, mesoderm, and endoderm.

胚胎发育过程由三个胚层组成，分别是：外胚层、中胚层与胚层。

The other type are immature teratomas, and they develop specifically from neuroectoderm cells - which come from the ectoderm layer.

二种是未成熟畸胎瘤，专门由神经外胚层细发育而来，来自外胚层。

The layer of cells, the endoderm, is thin, like the ectoderm, allowing nutrients to be directly absorbed into the surrounding cells.

细胚层很薄，像外胚层一样，可以让营养物质直接被周围细吸收。

The jellyfish body is mainly composed of mesoglea, a jelly-like fluid sandwich between the outer ectoderm and the inner digestive cavity the endoderm.

水母身体主要由中间胶质组成，中间胶质是一种果冻状液体，夹在外外膜和消化腔膜之间。

The jellyfish's outer layer of cells, called the ECTODERM, is so thin that oxygen dissolved in the water can simply diffuse right through it.

水母外胚层细非常薄，溶解在水中氧气可以直接穿过它。

Very early on in fetal development, the ectoderm which is the outer layer of the fertilized egg starts to develop a bit of a ridge that eventually becomes the neural tube.

在胎儿发育早期，受精卵外层，即外胚层，开始形成脊状突起，最后形成神经管。