unuseful

However, my family does not agree with me to collect these things, because they feel these things are unuseful.
但是，我的家人却不同意我收藏这些东西，因为他们觉得这些东西没有用。
If the electrode tip was kept in a dry environment, it will also become unuseful quickly.
Otherwise, no matter how to formulated perfect regulations in law and how to cultivate educated talents, which is unuseful.
否则，不论制定多么完美的法律法规、培养多么博学的法学人才，都只能是纸上谈兵、甚至南辕北辙。