Once professional brokers got in on the act, though, the nature of exchanges began to shift. Buyers and sellers lost some of their close contact with markets.
自从专业经纪人介入到交易中，交易的性质即开始发生变化：买主及卖主丧失了与市场的一些联系；交易变得越来越复杂，比如说可以以当前价格买卖将来的货物。
In a few moments they re-establish eye contact with the listener or reassure themselves that their audience is still attentive, then shift their gaze away once more. CET-6, 1997.6.
一会儿他们又会与听者重新建立眼神的交流，或再确定一下他们的听众是否仍在注意听。
Lone workers onfixed base, contact at the beginning and end of the shift.
所有在固定岗位的单独工作者必须在每班开始和结束时进行联系。
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