Writing in the last year of his life, he expressed the opinion that in two or three respects his mind had changed during the preceding twenty or thirty years.
Do bear in mind, though, that at this time of year the weather is very changeable and if the cloud suddenly descends, it's all too easy to wander off the track.
但是要记住，每年的这个时候天气变化无常，如果乌云突然降落，就很容易偏离轨道。
3
After a year and a half, I had progressed a lot, both in body and mind, to return to school.