/ɪˈsenʃl ||; əˈsɛnʃəl/adj completely necessary; that you must have or do 基本的；必需的:
essential medical supplies 基本的医疗物资Maths is essential for a career in computers. 做计算机这一行数学基础一定要好。It is essential that all school-leavers should have a qualification. 对于刚刚离开学校的年轻人来说，学历是非常重要的。 essential noun [C] [usu.pl] food, and other essentials such as clothing and heating 食物和其他必需品，如衣服和暖气