Your children can learn the true origin of our foods, the hard work required to harvest them, and the importance of buying locally.
农场郊游可以让孩子们了解到，他们吃到的食物是人们辛辛苦苦播种收获而来的，购买当地的农产品有多么的重要。
Therefore, the true origin of any piece of wood packing material is difficult to determine and thus its phytosanitary status cannot be ascertained.
因此，所有木质包装材料的真实原产地难以确定，从而使其植物检疫状况也不能确定。
"Money Laundering" is the introduction of illegally gained assets into the legal financial system with the aim of concealing or disguising their true origin.
“洗钱”是将非法获得的资产融入合法的金融体系中，目的在于隐瞒或者掩饰它们的真实来源。
The weakness in Internet Protocol is that the source host itself fills in the IP source host id, and there is no provision in TCP/IP to discover the true origin of a packet.
IP协议中最脆弱的策略就是让源主机自己填写源IP地址，并且在TCP／IP协议中也没有提供一种机制来验证源IP地址的真实性。
The weakness in Internet Protocol is that the source host itself fills in the IP source host id, and there is no provision in TCP/IP to discover the true origin of a packet.
IP协议中最脆弱的策略就是让源主机自己填写源IP地址，并且在TCP／IP协议中也没有提供一种机制来验证源IP地址的真实性。
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