其中一些，比如信鸽，可以训练来传递信息和包裹。
Some, like homing pigeons, can be trained to deliver messages and packages.
到1999年2月，其追踪程序升级到可以允许联邦快递的客户同时查询和接收达到25个订单的包裹状态信息。
In February 1999, the tracking application was enhanced to allow FedEx customers to query and receive package status information for up to 25 shipments simultaneously.
用可反射层包裹纤维，可以通过纤维震动来进行信息编码。
Covering fibres in a reflective coating allows them to be used to encode information within their vibrations.
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