For instance, in order to maintain flight safety, a practical terminal navaids system with Category II Instrument Landing System (ILS) operational standard including glide path, localizer, distance measurement, inner, middle and outer markers, compass locator, lighting, radar and link systems was established.
一千兩百公頃的土地內，布滿大小河流、灌溉圳道、河塘、水田，有的地方太軟，有的地方又太高。先得將鬆軟的表土挖掉、再將整片土地剷平、然後填土。