Their lives were overshadowed by their mother’s mental illness and Nash himself was greatly helped by his nurse who, with some elderly neighbours, introduced him to the universe of plants.

【参考答案】

他们的生活由于母亲的精神疾病而变得灰暗，而纳什本人深受其保姆和年长的邻居的帮助，是他们把纳什带进了植物的世界。