過去式：irrigated 過去分詞：irrigated 現在分詞：irrigating
... this year, with some 40,000 acres of crops that will be under-irrigated. >> under-irrigated: 未被灌溉的, 也就是指約有 4萬公頃農作物將...
回答： Please help me to water flowers or irrigate the garden at 8:16 pm. 因為你說要簡單一點的，所以不用blossom而用flowers. 如果你希望更簡單一點，可以再把irrigate改成water即可.
...admirable water supply system was built on the hillside for the purpose of irrigating the nearby farmland. This admirable water supply system was built...