To enable it you will have first have to have defeated the Lich King on normal mode, and heroic mode will not affect trash in anyway and will only change the bosses.

要启用它，你将必须首先战胜了正常模式的巫妖王，和英雄模式将不会影响在垃圾无论如何，只会改变老板。

youdao

Meanwhile, investors are earning dividend yields so hefty that trash, rather than cash, may be king.

WSJ: Upside: Trash Stocks Unfairly Trashed