So, even under normal situations, the gene flow among the subpopulations is more of an intermittent trickle than a steady stream.
所以即使在正常条件下，这些亚物种间的基因流动也更像是一条断断续续的细流，而不是一条不停流淌的小溪。
2
The researchers pointed out that low-frequency processes, such as fluctuations in streamflow and groundwater levels, would not usually be apparent to human populations.
研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。
3
Traditional water right trading between different users may bring third-party effects as reducing the instream flow of the intermediate stream and downstream.