As we know, knowledge is the indispensable condition for expansion of the mind.
正如我们所知道的，知识是不可缺少的条件为扩大思想。
It's is well known that knowledge is the indispensable condition for expansion of mind.
众所周知，知识是开阔思路不可缺少的条件。
Water is man 's indispensable material condition for existence.
水是人类生存所必需的物质条件。
Water is man 's indispensable material condition for existence.
水是人类生存所必需的物质条件。
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