Beta 通道规则调整：若用户四个月未安装任何测试版，系统将自动切回公开版更新通道；
圖像來源，BBC CHINESE/ TING CHIANG
，详情可参考51吃瓜
Lovell retired from the navy in 1973 and opted for a the quiet life, working for the Bay-Houston Towing Company, giving speeches and serving as president of the National Eagle Scout Association.
本法所称原子能，也称核能，是指裂变、聚变、衰变等核反应释放的能量。
Proposition: Grammarly identifies misplaced and confused prepositions.