这时，姐姐就坐在灶火拉风箱，吧嗒吧嗒的，母亲就站在锅台边用手转着翻着干粮，同时叮嘱姐姐掌握火候。
B-Time I-Time O B-Person I-Person O O O B-Thing I-Thing I-Thing I-Thing I-Thing O O O O O O O B-Person I-Person O O O B-Location I-Location I-Location O B-Thing O O O O B-Thing I-Thing O O O O O B-Person I-Person O O O O O