Polar

['pəʊlə] or ['polɚ]

解释:

(adj.) having a pair of equal and opposite charges .

(adj.) of or existing at or near a geographical pole or within the Arctic or Antarctic Circles; 'polar regions' .

(adj.) located at or near or coming from the earth's poles; 'polar diameter'; 'polar zone'; 'a polar air mass'; 'Antarctica is the only polar continent' .

校对:奥利弗--From WordNet

解释:

(a.) Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds.

(a.) Of or pertaining to the magnetic pole, or to the point to which the magnetic needle is directed.

(a.) Pertaining to, reckoned from, or having a common radiating point; as, polar coordinates.

(n.) The right line drawn through the two points of contact of the two tangents drawn from a given point to a given conic section. The given point is called the pole of the line. If the given point lies within the curve so that the two tangents become imaginary, there is still a real polar line which does not meet the curve, but which possesses other properties of the polar. Thus the focus and directrix are pole and polar. There are also poles and polar curves to curves of higher degree than the second, and poles and polar planes to surfaces of the second degree.

亨廷顿编辑

解释:

adj. pertaining to or situated near either of the poles: pertaining to the magnetic poles: having a common meeting-point.—n. (geom.) the line joining the points of contact of tangents drawn to meet a curve from a point called the pole of the line.—ns.pl. Pōlar-co-or′dinates co-ordinates defining a point by means of a radius vector and the angle which it makes with a fixed line through the origin; Pō′lar-for′ces forces that act in pairs and in different directions as in magnetism.—n. Polarim′eter the polariscope.—adj. Polarī′sable capable of polarisation.—ns. Polarisā′tion (opt.) a particular modification of rays of light by the action of certain media or surfaces so that they cannot be reflected or refracted again in certain directions: state of having polarity; Polar′iscope an instrument for polarising light and analysing its properties.—v.t. Pō′larise to give polarity to.—ns. Pō′lariser that which polarises or gives polarity to; Polar′ity state of having two opposite poles: a condition in certain bodies according to which their properties arrange themselves so as to have opposite powers in opposite directions as in a magnet with its two poles.—Polar bear a large white bear found in the Arctic regions; Polar circle a parallel of latitude encircling each of the poles at a distance of 23?28′ from the pole—the north polar being called the arctic the south the antarctic circle; Polar lights the aurora borealis or australis.

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