For others (normal non-real-time processes), it is zero.
对于其他的(普通的非实时进程)，它为零。
The question is that in the real world, transaction cost can never be zero.
问题是，真实世界里的交易费用绝不为零。
It also means that even at zero, real interest rates are too high.
其也意味着即使是零，实际的利率是过高的。
It also means that even at zero, real interest rates are too high.
其也意味着即使是零，实际的利率是过高的。
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