《荀子·劝学》
靛青是从蓼蓝中提取而来的，但比蓼蓝更青；冰是由水凝固而成的，但比水还要寒冷。
青，取之于蓝而青于蓝；冰，水为之而寒于水。
Indigo is extracted from the woad plant, but it is bluer than woad; ice is frozen water, but it is colder than water.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 青，取之于蓝而青于蓝；冰，水为之而寒于水。 [/INST] Indigo is extracted from the woad plant, but it is bluer than woad; ice is frozen water, but it is colder than water.</s>
Explain the meaning of this Classical Chinese passage in English: 青，取之于蓝而青于蓝；冰，水为之而寒于水。
user
Indigo is extracted from the woad plant, but it is bluer than woad; ice is frozen water, but it is colder than water.
assistant