Longstanding
a. 长期间的, 长期存在的
✅ 同义词
🔴 反义词
🗣️ 情景例句
It was a gradual process, involving many factors.
这是个渐进的过程，涉及到方方面面。
May I have a customs declaration form, please?
请给一份海关申报表好吗？
Use this treatment twice a day for a week. And another thing, at the end of the week, throw the frozen peas away. They won't be fit to eat.
一天治疗两次，一周为一个疗程。还有，一周以后要把冻豌豆扔掉。它们不能吃。