而同一个信号在不同的时期强度相差悬殊。
The signal amplitude is quite different in the different period.
在不同时期,同一个人或公司可能会分别充当经纪商或自营商的角色。
The same individual or firm may function, at different times, either as broker or dealer.
在不同时期,同一个人或公司可能会分别充当经纪商或自营商的角色。
The same individual or firm may function, at different times, either as broker or dealer.
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