Firefox: https://addons.mozilla.org/firefox/addon/single-file
- `~(_*a_*)` = any string that does NOT contain 'a'，详情可参考PDF资料
，详情可参考91视频
Breakdown of U.S. retail packaging by weight. Adhesives, inks, and coatings are excluded from calculations.
4. The cast operator is ambiguous。业内人士推荐爱思助手下载最新版本作为进阶阅读
Added symbol-append to (hoot symbols).