"Useless things" in Engpsh can be referred to as "junk" or "trash".
This expression comes from the idea of things having no value or being discarded because they are no longer needed.
Examples:
"I cleaned out my closet and got rid of all the junk."
"This broken television is just trash, let's throw it away."
Translations:
"我清理了我的壁橱，扔掉了所有的垃圾。"
"这台坏了的电视机只是垃圾，让我们扔掉它。"