The water quality was more stable in high flow period and more changeable in low flow.

丰水期水质比较稳定，枯水期水质变化相对比较大。

youdao

The distribution form and the selection methods in low flow frequency analysis were introduced.

介绍枯水频率分析中的常用线型以及频率分布线型的选择方法。

youdao

The researchers pointed out that low-frequency processes, such as fluctuations in stream flow 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。

youdao

For a major overhaul, consider installing photovoltaic cells on your roof, hydronic radiant heating in your floors, double-glazed panes in your windows and low-flow toilets in your bathroom.

FORBES: Julia Cosgrove

The first of our three stock screens selected companies in the Worldscope database whose prices today are at historically low multiples of earnings, cash flow (in the sense of net income plus depreciation) and book value.

FORBES: Do It Yourself

The lesson, at the end of the day, is this: When looking at lists of companies selling in the market at low multiples to cash flow or earnings, investors must discriminate.

FORBES: Bargains And Dogs