由此可知...
Grammar & Usage
How it works
This expression is used to introduce a conclusion or inference drawn from previously stated facts or evidence. "由此" (yóu cǐ) means 'from this' or 'thereby', and "可知" (kě zhī) means 'can be known' or 'it is knowable'. It functions as a conjunctive phrase, signaling that the subsequent statement is a direct deduction from what has just been presented.
Sample sentences
数据表明，近几年环境污染日益严重，由此可知，我们需要采取更积极的措施来保护地球。
Data shows that environmental pollution has become increasingly severe in recent years; from this, it can be concluded that we need to take more proactive measures to protect the Earth.
经过长时间的观察，我们发现这种植物只能在特定的气候条件下生长，由此可知，其对环境要求极高。
After long-term observation, we found that this plant can only grow under specific climatic conditions; from this, it can be known that its environmental requirements are extremely high.
他每天坚持锻炼，饮食健康，由此可知，他非常注重自己的身体健康。
He insists on exercising every day and eats a healthy diet; from this, it can be seen that he pays great attention to his physical health.
Mnemonic
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Example
数据表明，近几年环境污染日益严重，由此可知，我们需要采取更积极的措施来保护地球。
Data shows that environmental pollution has become increasingly severe in recent years; from this, it can be concluded that we need to take more proactive measures to protect the Earth.
经过长时间的观察，我们发现这种植物只能在特定的气候条件下生长，由此可知，其对环境要求极高。
After long-term observation, we found that this plant can only grow under specific climatic conditions; from this, it can be known that its environmental requirements are extremely high.
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