单词	Wenchuan disaster area
释义	Wenchuan disaster area 汶川灾区
随便看	proportional counter proportional counters proportional counter spectrometer proportional-counter spectrometer proportional countertube proportional counter tube proportional counter tubes proportional coupling proportional cover proportional current time product proportional damping proportional data proportional deduction proportional delay differentiation model proportional depth proportional derivative proportional-derivative action proportional-derivative control proportional-derivative controller proportional design proportional detector proportional development proportional device proportional-differential control proportional differential controlling