1. 一般認為像木工和烹飪之類的實用課程不如數(shù)學重要。
   Practical lessons, like woodwork and cookery, are not considered as important as maths.
2. 他們的研究項目實用價值很有限。
   Their research project has limited practical utility.
3. 你收集到的大部分情報沒有實用價值。
   Much of the information you have gleaned is of no practical use.
4. 這本書理論性太強，我需要一本實用的。
   This book is too theoretical; I need a practical one.
5. 你的發(fā)明不實用。
   Your invention is not practical.

實的英語翻譯：

用的英語翻譯：