查询词典 nebula

The sands of time are running out for the central star of this hourglass shaped planetary nebula .

对产生这个行星状星云的中心恒星来说，它的来日的确是不多了。

The term planetary nebula , used to describe this general class of objects , is misleading .

这一类天体有一个令人误解的术语，那就是&行星状星云&。

A planetary nebula represents the final stage in the evolution of a star similar to our Sun.

行星状星云是类似于太阳的恒星的演化归宿。

Many objections can be raised to this picture of planetary nebula formation .

形成行星状星云的这一图象可能会引起许多异议。

The Sun is expected to go through its own Planetary Nebula phase .

再过五十亿年，太阳预期也会进入行星状星云阶段。

The star primarily responsible for this interstellar sculpture can be found in the planetary nebula's center.

至于造成这座星际雕塑品的始作俑者，我们可以在行星状星云的中心看到此恒星的尊容。

A planetary nebula is an expanding cloud of gas ejected from a star that is nearing the end of its life.

行星状星云一个由来自中心濒临死亡恒星所释放出的气体组成的正在膨胀的星云。

The Helix planetary nebula is constructed from matter ejected by a dying Sun-like star, almost 690 light-years away.

这种螺旋行星状星云是由一颗即将消逝的恒星所喷发出来的大量物质所有形成的，大概距离地球690光年。

These new developments enable us to identify the first instance of symmetry breaking in the evolution from AGB to planetary nebula.

这个新发现使我们能够鉴认AGB星从打破球对称结构到最终形成行星状星云的最初一步。

The white dot at the Helix's center is this Planetary Nebula 's hot , central star .

螺旋星云中央的白点就是这个行星状星云炽热的中央星。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

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镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。