The present application relates to compounds of the formula . The nail clipper is provided with bosses formed either on the lever or on the supporting shaft, so as to allow the supporting shaft to pivotally support the lever; and grooves formed on the rest of the supporting shaft and the lever, with which the bosses are engaged. The technical solution includes performing time-domain processing on an input audio transient signal; dividing sampling points x1,x2,. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented.