报关单核验是指对进出口货物的报关单进行核实和查验的过程，以确保报关单填写的信息准确、完整、合规，符合海关监管要求。

报关单核验的主要内容包括：核对报关单上的品名、规格、数量、价值、原产地、贸易方式、进口商、出口商等信息是否准确；检查报关单上的货物是否符合相关法律法规和海关监管要求；确认报关单上的签名、印章是否真实有效；核实报关单上的计量单位、货币代码是否符合标准等。

报关单核验的意义在于：确保进出口货物的合法性和合规性，防止走私、偷税漏税等违法犯罪行为的发生；保障国家的税收利益和经济安全；提高海关监管的效率和准确性；为国际贸易的顺畅进行提供保障。

英文对照：

报关单核验是指对进出口货物的报关单进行核实和查验的过程，以确保报关单填写的信息准确、完整、合规，符合海关监管要求。

The verification of customs declarations refers to the process of checking and verifying the information filled in the customs declarations of import and export goods to ensure that the information is accurate, complete, compliant, and in line with customs regulatory requirements.

报关单核验的主要内容包括：核对报关单上的品名、规格、数量、价值、原产地、贸易方式、进口商、出口商等信息是否准确；检查报关单上的货物是否符合相关法律法规和海关监管要求；确认报关单上的签名、印章是否真实有效；核实报关单上的计量单位、货币代码是否符合标准等。

The main content of the verification of customs declarations includes: checking whether the information on the customs declarations, such as commodity name, specification, quantity, value, place of origin, trade mode, importer, and exporter, is accurate; examining whether the goods on the customs declaration comply with relevant laws, regulations, and customs regulatory requirements; confirming whether the signature and seal on the customs declaration are authentic and valid; verifying whether the measurement unit and currency code on the customs declaration are in accordance with the standards, etc.

报关单核验的意义在于：确保进出口货物的合法性和合规性，防止走私、偷税漏税等违法犯罪行为的发生；保障国家的税收利益和经济安全；提高海关监管的效率和准确性；为国际贸易的顺畅进行提供保障。

The significance of the verification of customs declarations lies in: ensuring the legality and compliance of import and export goods, preventing the occurrence of illegal and criminal acts such as smuggling, tax evasion, and tax avoidance; safeguarding the country's tax interests and economic security; improving the efficiency and accuracy of customs supervision; and providing guarantees for the smooth conduct of international trade.