#!/usr/bin/env bash
ffmpeg -i file.mp3 -lavfi showspectrumpic=s=1200x600:mode=combined:color=viridis output.png这样就生成了 file.mp3 这个文件的频谱图，分辨率是 1200x600，生成的图片名字叫 output.png，使用的配色方案是 viridis。
，这一点在Line官方版本下载中也有详细论述
В России создали жевательную резинку для защиты от кариесаРоссийские ученые создали умную жевательную резинку для защиты от кариеса，推荐阅读51吃瓜获取更多信息
回顾历史，1960年代，Boswell基金会提供120万美元匹配赠款，撬动居民募捐，建成了第一家医院；1988年，Sun Health基金会捐赠900万美元，建成第二家医院。截至目前，两大基金会累计筹集超过5亿美元，支撑着医院从无到有、从基础到现代化的每一步。，推荐阅读夫子获取更多信息
This is the best-looking power bank we've tried, and the price comes within $10 of the lowest we've tracked. The transparent housing and triangle shape are cool, but the battery also performs well, with a 24,000-mAh capacity, a maximum output of 170 watts, and even a little bit of water resistance. There's a display that'll show you battery life, time remaining until a full charge, and the input or output in watts. The battery itself charges up in a little under an hour, provided you have the right cable and charger, and it can top off three devices simultaneously.