in a way that shows you want to have something too much, especially something that belongs to someone else

The boys looked covetously at the shiny new motorcycles. 男孩们贪婪地看着崭新的摩托车。

Later, over lunch, I look covetously at Neil's dessert. 后来，整个午餐过程中，我贪婪地盯着尼尔的甜点。