Translated from English to Chinese, it was an article on astronomy!

Please do me a great favor! Don't use a translator! thx! The hydrologic cycle is described in terms of six major components : precipitation , infiltration , evaporation , transpiration , surface runoff , and groundwater flow . For computational purposes , evaporation and transpiration are sometimes lumped together as evapotranspiration . Figure 1.1 defines these components and illustrates the paths they define in the hydrologic cycle . Figures 1.1 and 1.2 illustrate that some precipitation evaporates before reaching the earth and remains in the atmosphere as water vapor . Water also evaporates after reaching the earth . Plants take up infiltrated water and groundwater and return a portion of it to the atmosphere through their leaves , a process known as transpiration . Some infiltrated water may emerge to surface-water bodies as interflow , while other portions may become groundwater flow . Groundwater may ultimately be discharged into streams or may emerge as springs . After an initial filling of interception and depression storages , and providing that the rate of precipitation exceeds that of infiltration , overland flow (surface runoff) begins . The magnitude and duration of a precipitation event determaine the relative importance of each component of the hydrologic cycle during that event . During storm events , evaporation and transpiration may be minor considerations , for example , but during rain-free periods , evapotranspiration becomes a dominant feature of the hydrologic cycle. But soils and rocls are subjected to the dissolving processes of water , and these processes amy slso impart chemacal constituents to water moving through them . A major problem for water managers is that of dealing with impaired water quality , especially where geoundwater systems are involved . It is important to consider both the quantity and quality of water when decisions regarding its management are being contemplated. The hydrologic cycle , while simple in concept , is in reality , very complex . Paths taken by precipitated droplets of water are many and varied before the sea is reached . The time scale may be on the order of seconds , minutes , hours , days , or even years.