“void”的概念、定义、翻译、参考文献-科学参考

void

Astronomy

A region of space containing far fewer galaxies than average, or even no galaxies at all; also known as a cosmic void. Voids with less than one-tenth the average density of the Universe on scales of up to 200 million l.y. have been detected in large-scale surveys. These regions are often (but not always) approximately spherical. The first large void was detected in Boötes in 1981; it has a radius of about 180 million l.y. and its centre is approximately 500 million l.y. from the Milky Way. The existence of large voids is not surprising, given the existence of clusters of galaxies and superclusters on very large scales.

Geology and Earth Sciences

A hole in a rock. If they are interconnected, voids form paths along which water and other fluids may flow. In increasing order of size, the major types of voids are: intercrystalline boundaries; intergranular pores or spaces between the grains of a sediment; microfractures or local cracks, usually extending for only a few tens of centimetres and from a few micrometres to 0.1 mm wide; fractures including joints, small faults, and bedding planes, which are often extensive and may have openings up to a few millimetres wide; fissures formed by solution, weathering, or local gravitational or tectonic displacement, and up to about 10 cm wide; and solution channels, which range up to several metres wide and many hundreds of metres long.

Philosophy

The notion of empty space (like that of eventless time) proved repugnant to Parmenides and the Stoics, and much later, but for similar reasons, to Descartes. One reason for disliking the idea may be based on confusion about the allegedly paradoxical existence of nothing (for nothing is precisely what there is in empty space), others find it contrary to the plenitude of God that he should allow there to be nothing where he could have put something. Other problems arise from trying to conceive of the passage of force and information through a vacuum. In modern quantum mechanics, space is not empty, but seething with latent or virtual particles, ready to spring into being if various physical events occur. See also action at a distance, field.

单词	void
释义	void Astronomy A region of space containing far fewer galaxies than average, or even no galaxies at all; also known as a cosmic void. Voids with less than one-tenth the average density of the Universe on scales of up to 200 million l.y. have been detected in large-scale surveys. These regions are often (but not always) approximately spherical. The first large void was detected in Boötes in 1981; it has a radius of about 180 million l.y. and its centre is approximately 500 million l.y. from the Milky Way. The existence of large voids is not surprising, given the existence of clusters of galaxies and superclusters on very large scales. Geology and Earth Sciences A hole in a rock. If they are interconnected, voids form paths along which water and other fluids may flow. In increasing order of size, the major types of voids are: intercrystalline boundaries; intergranular pores or spaces between the grains of a sediment; microfractures or local cracks, usually extending for only a few tens of centimetres and from a few micrometres to 0.1 mm wide; fractures including joints, small faults, and bedding planes, which are often extensive and may have openings up to a few millimetres wide; fissures formed by solution, weathering, or local gravitational or tectonic displacement, and up to about 10 cm wide; and solution channels, which range up to several metres wide and many hundreds of metres long. Philosophy The notion of empty space (like that of eventless time) proved repugnant to Parmenides and the Stoics, and much later, but for similar reasons, to Descartes. One reason for disliking the idea may be based on confusion about the allegedly paradoxical existence of nothing (for nothing is precisely what there is in empty space), others find it contrary to the plenitude of God that he should allow there to be nothing where he could have put something. Other problems arise from trying to conceive of the passage of force and information through a vacuum. In modern quantum mechanics, space is not empty, but seething with latent or virtual particles, ready to spring into being if various physical events occur. See also action at a distance, field.
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