由此

由此 is an adverb meaning 'therefore' or 'as a result.' It indicates a logical connection between two events, showing that one action or situation leads to another.

The character 由 (yóu) originally meant 'from' or 'by,' and it can also imply a cause or origin. 此 (cǐ) means 'this' or 'here,' referring to a specific point in time or place. Together, 由此 suggests a causal relationship starting from a particular point, leading to a result.

This phrase is commonly used in both spoken and written Chinese to show logical progression. It is especially useful in academic, formal, or analytical contexts where clear cause-and-effect relationships are important. In daily conversation, it helps explain why something happened or what the consequences were.