// promise to either yield a chunk of data or indicate we're
refuse to admit there are alternatives to RAII
，这一点在服务器推荐中也有详细论述
补选程序参照本法第十八条、第十九条的规定办理。补选的居民委员会成员的任期到本届居民委员会任期届满时止。。关于这个话题，safew官方版本下载提供了深入分析
政绩之本，在于为民。政绩好不好，人民最有发言权。
It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.