long-acting

例句：

1. 1.The medicine is long-acting, so you can take it every night without worrying about side effects.
   这种药是长效的，所以你可以每晚服用而不用担心副作用。
2. 2.The project requires a long-acting plan to ensure its success.
   这个项目需要一种长效的计划来确保其成功。
3. 3. The new product is long-acting, providing users with a continuous supply of energy for several days.
   新产品是长效的，为用户提供几天的持续能量供应。