一到中年，就有许多不愉快的现象，眼睛昏花了，记忆力减退了，头发开始秃脱而且变白了，意兴，体力甚麽都不如年青的时候，常不禁会感觉到难以名言的寂寞的情味，尤其觉得难堪的是知友的逐渐减少和疏远，缺乏交际上的温暖的慰藉。
Especially when I realized the gradual decline of the number of friends the farther I am away from them, I lack the comfort delivered by the warmth of communication.
同时，必须注意到，严重和致命感染病例中约有三分之一到半数是原本健康的年轻人和中年人。
At the same time, it is important to note that around one third to half of the severe and fatal infections are occurring in previously healthy young and middle-aged people.
有三分之一到一半的严重致命性疾病发生在健康的青年和中年人身上。
A third to half of the severe and fatal cases have occurred in young and middle-aged people who were previously healthy.
有三分之一到一半的严重致命性疾病发生在健康的青年和中年人身上。
A third to half of the severe and fatal cases have occurred in young and middle-aged people who were previously healthy.
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