what is the meaning of this sentence and the phrase"by that"?Overall,i think an ability to keep clear perspectives in life is a more essential factor in achieving happiness.By that i mean an ability to have a clear sense of what is important in our lives and what is not.thanks and could you like to explain the "by that" and what really worried me is the later sentence,does it seem to be without a predict and be not a whole sentence?
问题描述：
what is the meaning of this sentence and the phrase"by that"?
Overall,i think an ability to keep clear perspectives in life is a more essential factor in achieving happiness.By that i mean an ability to have a clear sense of what is important in our lives and what is not.
thanks and could you like to explain the "by that" and what really worried me is the later sentence,does it seem to be without a predict and be not a whole sentence?
答
By that
通过（前面提到的）那些
答
总的来说，我认为在生活中对未来保持清醒的头脑是得到幸福非常必要的因素。也就是说，要清楚什么是重要的什么不是。
答
总的来水哦,我认为在追求幸福时,对周围的生活拥有清醒的头脑clear perspectives 是一个很必要的因素.我的意思是说在生活中能明确的分辨什么是重要的什么是次要的.
by that 指上一句提到的clear perspectives