Definition: very important and necessary Level: B1
如果项目要成功，政府支持将是必不可少的。
Government support will be ___essential if the project is to succeed.
计算机是我们生活中不可或缺的一部分。
Computers are an ___essential part of our lives.
我们的价格保持竞争力是至关重要的。
It is ___essential that our prices remain competitive.
