Often these games are also money-spinners for the makers as players have to spend money to advance the storyline.
这些游戏通常也是制作者们的摇钱树，因为玩家不得不花钱以推进游戏进程。
2
Their customers also pay for the whole trip in advance and bring a little moneyfor extra items.
来自旅行社的游客也是预先支付整个行程的费用，可以用来购买额外物品的钱不多。
3
Initially she used to send me a bill at the month end, but when I told her that I am not her client but her husband, she asks for the money in advance.