useful

/ˈjuːsf(ə)l/📚 2043 39 4四级六级考研雅思中考高考
If something is useful, you can use it to do something or to help you in some way. 有用的

adjective [原级]有用的,有益的;<英,非正式>好的,熟练的

The pressure cooker is very useful for people who go out all day.
压力锅对整天外出的人非常有用。

useful

-ful ⌜ 表示满量的 - indicating full of or characterized by ~ ⌟
useful 出现在下面的课文中
Lesson 58 A blessing in disguise?
Lesson 59 Collecting
Lesson 60 Too early and too late
Lesson 1 Finding fossil man
Lesson 17 A man-made disease
Lesson 29 The hovercraft
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