“慢性的”的英语？

他们认为他母亲的病是急性的,不是慢性的.They think his mother's illness is acute rather than chronic.长期暴露或重复暴露, 无控制暴露以及过度暴露都可能引起慢性的 、 逐渐发展的大脑不适.Prolonged or recurrent, uncontrolled, excessive exposure can result in a slow, progressive ...