Existing from the nature of the case. 必然的。 Not to be done without; essential; indispensable. 必须的；重要的；不可缺的。 Sleep is necessary to health. 睡眠是健康所不可或缺的。 It is necessary for you to start at once. = It is necessary that you should start at once. 你必须立即出发。 Unavoidable; inevitable. 不可避免的；无法逃避的。 Acting under obligation or compulsion. 因义务而为的；被迫而为的。 A thing which cannot be done without. (常用复数)必要物；必需品。 necessaries of life 生活必需品。 |