报价为吊坠，不含配链。
宾州州立大学供应链管理副教授Bob Novack称，目前沃尔玛将近150个配货中心中只有少数几家支持RFID技术。
Currently only a handful of Wal-Mart's nearly 150 distribution centers are RFID-enabled, according to Bob Novack - an associate professor of supply chain management for Penn State.
按照已有的酶活性中心的金属-氨基酸侧链配位和空间关系，设计合成多齿配体，并使配体和金属离子通过配位作用形成配合物。
They are designed according to the special relations and coordination of metal-amino acid side chain in the active centre in known enzymes.
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