真诚的希望各位朋友帮我解答下这两句英语

【全句是： people also accumulate things for two other reasons, lack of physical and mental energy, both of which are essential in turning out and throwing away, and sentiment.】

essential是必不可少的意思，”必不可少的因素“是根据essential翻译的。lack of physical and mental energy和sentiment（感情）就是那两个reasons，both...这句是插入的。可以先不看这一句，结构就很清楚：people also accumulate things for two other reasons, lack of physical and mental energy and sentiment。人们积攒东西还有两个原因，身心无力和感情因素。

插入句中的：turning out 和throwing away对应“清除无用的东西”，turn out是把东西腾出来，throw away是丢东西。
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我的理解，希望对你有帮助~