单词 | five-and-ten system |
释义 | five-and-ten system [¦fīv ǝn `ten ´sis·tǝm] METEOROLOGY The most common system for representing wind speed, to the nearest 5 knots, in symbolic form on synoptic charts, consisting of drawing the appropriate number of half-barbs, barbs, and pennants from the end of the wind-direction shaft; in this system, a half-barb represents 5 knots, a barb 10 knots, a pennant 50 knots. |
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