星系

We first present a brief review in Chapter 1 on both theories and observations of GRBs, including bursts themselves, afterglows, energy engine, host galaxies, environments, high energy particles and gravitational radiation, relation to cosmology, etc.

第一章是伽玛暴领域的简述，在观测和理论上都作了简要但较全面的综述，内容包括了伽玛暴本身、余辉、能源机制、寄主星系、暴周环境、高能粒子和引力波辐射、宇宙学意义，等等。

But I said there were a couple of ways to use neighboring constellations to find the Andromeda galaxy.

但是我刚说过要介绍几种利用周边星座寻找仙女座星系的办法。

In fact, with over twice the diameter of our own Milky Way, Andromeda is the largest nearby galaxy.

事实上，它的直径是我们银河系的2倍多，是我们附近最大的星系。

If you can't see the Andromeda galaxy with the unaided eye, try binoculars.

如果你无法通过肉眼看到仙女座星系，试着用双筒望远镜吧。

If you can't see the Andromeda galaxy with the unaided eye, try binoculars.

如果你用肉眼看不到仙女座星系的话，试试望远镜。

And, indeed, this haze represents the light of the Andromeda galaxy's billions of stars.

当然，这个模糊的斑点就代表着仙女座星系中数十亿星星的光辉。

If you need some help finding the Andromeda galaxy, there are a couple of different ways to use neighboring constellations to find it.

如果你需要一些帮助来找仙女座星系，通过旁边的星座可以有很多不同的方法来找到仙女座。

If you have a really dark sky, you can see the Andromeda galaxy at this time of year … simply by looking up.

如果在很黑的夜晚，在一年中的这个时侯就是最佳观看仙女座星系的时间。

This deeper V is your "arrow" in the sky, pointing to the Andromeda galaxy.

这个深一些的V就是天空中指向仙女座星系的&箭头&。

If you need some help finding the Andromeda galaxy, there are a couple of different ways to use neighboring constellations to find it.

如果你需要一些帮助去找仙女座星系，利用邻近的星座有很多不同的方法找到它

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。