necessary
形容詞
UK/ˈnes.ə.ser.i/
US/ˈnes.ə.ser.i/
定義 necessary 形容詞
- B1
Required to achieve a particular outcome.
必需的；不可或缺的
They need the necessary permits to start the project.
他们需要必要的许可证才能开始这个项目。
To ensure the accuracy of the experiment, it is necessary to take the required precautions.
为了确保实验的准确性，采取必要的预防措施是必须的。
In this situation, discretion is absolutely necessary.
在这种情况下，谨慎是绝对必要的。
Used in negative statements and questions to indicate disapproval of something as unnecessary or inappropriate.
（用于否定句和疑问句，表示不赞同）不必要的；没道理的
I don't think raising your voice was necessary at the meeting.
我不认为你在会议上提高音量是必要的。
Was it really necessary for you to be so harsh in your comments?
你真的有必要在评论中这么苛刻吗？
The extra cost is not necessary, we can choose a more economical option.
额外的成本是不必要的，我们可以选择更经济的选项。