（一）未经批准，安装、使用电网的，或者安装、使用电网不符合安全规定的；
writeSync(chunk) { addChunk(chunk); return true; },
，详情可参考heLLoword翻译官方下载
I tested the best Kindles to help you find the perfect e-reader
Some of their software was more serious; Beagle Bros released many useful tools and even text editing and presentation apps. They also sold practical posters: