单词	rheostat
释义	rheostat /ˈriːəstat / noun An electrical instrument used to control a current by varying the resistance.She learned how to bend neon tubing into shapes and how to connect electrical circuits and insert rheostats and timers to provide special visual effects.... A rheostat, aka potentiometer or variable resistor is exactly that - a resistor that limits the current passing through it at a varying level - in this case, depending on the position of a rotating knob. If your bathroom is bright, consider installing a rheostat (dimmer switch) or washing up by the light of a night light. Derivatives rheostatic /riːəˈstatɪk/ adjective ... This characteristic - a ‘rheostatic’ or ‘tunable’ quality - will allow commanders to increase or decrease the degree of influence used to effect compliance. Furthermore, in keeping with the principle of providing ‘rheostatic capability,’ the U.S. Department of Defense is trying to develop weapons which allow it to select a ‘duration of effects.’ We power out of Kananook along the straight track, and the customary hiss of the westinghouse air brake combines with the downward-grinding sound of the rheostatic brakes to alert us to our arrival at Frankston. Origin Mid 19th century: from Greek rheos 'stream' + -stat.
随便看	not to put too fine a point on it not to say unpracticeable unpracticed unpractise unpractised unpragmatic unpragmatical unpraisable unpraise unpraised unpraiseworthy unpray unprayable unprayed unprayed for unpreach unpreached unpreaching unprecarious unpreceded unprecedental unprecedented unprecedentedly unprecedential

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