用特异化学标记的短链DNA取代了混有稀土的复合物，每一个链有不同顺序的基因编码。
In place of combinations of rare-earth compounds, its unique chemical markers are short stretches of DNA, each with different sequence of genetic code.
通过链接活动，这些链路定义了集合内每个组件的执行顺序。
By connecting activities, these links define the order of execution of each component within the collection.
在这个请求设法通过过滤器链并被服务器处理之后，一个响应将以相反的顺序通过该链发送回去。
After the request works its way through the chain and is processed by the server, a response is sent back through the chain in reverse order.
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