adj.有用的; 有益的;

This kitchen gadget is really useful for peeling potatoes.
这个厨房小工具在削土豆皮的时候真的非常实用。
The first-aid kit in the car can be quite useful in case of an emergency.
车里的急救包在紧急情况下会非常有用。
Regular exercise has proved to be beneficial and useful for maintaining good health.
定期锻炼已经被证明对于保持健康有益且实用。
A dictionary is a useful tool for students learning a new language.
字典对学生学习一门新语言来说是一个有用的工具。
Solar energy is a renewable and highly useful resource for our future.
太阳能是一种可再生的、对我们未来极其实用的资源。
The strategy you proposed is not only innovative but also very practical and useful.
你提出的策略不仅创新，而且非常实用和有价值。
These tips on time management will be incredibly useful for busy professionals.
这些关于时间管理的小贴士对于忙碌的职业人士将极其有用。
Reading books regularly can be a useful habit to improve your knowledge and vocabulary.
经常阅读书籍可以成为一个有助于提高知识和词汇量的有用习惯。
A compass is an essential and useful instrument for hikers navigating through unfamiliar terrain.
指南针是徒步旅行者在陌生地形中导航时必不可少且有用的仪器。
The app that reminds us to drink water throughout the day is a simple yet incredibly useful tool.
那个提醒我们全天喝水的应用程序虽然简单，但却是一款极为实用的工具。