It's in the bag
十拿九稳，稳操胜券
释义：
(informal) if sth is in the bag, it is almost certain to be won or achieved 十拿九稳;稳操胜券
例句：
When the score got to 8 to 2, we knew the game was in the bag.
'I'll get the Republican nomination,' he assured me. 'It's in the bag.'
