ក្នុងការនិពន្ធរឿងមាន៤ចំណុចដែលអ្នកនិពន្ធមិនអាចខ្លះបាន។ តើចំណុចទាំង៤នោះមានអ្វីខ្លះ? ចូលពន្យល់ចំណុចនីមួយៗឲ្យបានត្រឹមត្រូវ។

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