Clearly the ability to record and exchange objects is of interest in more complex scenarios.
显然，在较复杂的情景中，记录和交换对象的能力很重要。
Some complex services require a more interactive exchange with a client.
一些复杂的服务需要和客户端进行更多的交互。
Talent market is the exchange site of complex labor force.
人才市场是复杂劳动力交换的场所。
However, the reasons why companies sell their stocks on the stock exchange are often complex.
但是公司在股市出售股票的原因是很复杂的。
However, the reasons why companies sell their stocks on the stock exchange are often complex.
但是公司在股市出售股票的原因是很复杂的。
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