"Leanback键盘" "Leanback键盘" "前往" "下个" "发送" "搜索" "完成" "键盘选项" "移动灵敏度" "开启" "关闭" "空格键" "删除" "模式更改" "Shift 键" "大写锁定" "向左键" "向右键" "需要插入耳机才能听到密码的按键声。" "点。"