clear clearly understood distinct be clear 參考例句Lacking clarity or distinctness; cloudy or obscure.模糊的不清楚的或者不明顯的;含糊的或者朦朧的 Vividly, he heard the Evil-Spirit debate with him. 他清楚地聽到魔鬼在同他辯論。 No one knew exactly how many pies his thumb had explored.誰都不清楚他插手了多少事情。 It is clear that obesity is a fantastically complicated condition, with a fantastic number of spots for science to step in and set things right.十分清楚的是，肥胖是一種極為復雜的病癥，對科學家來說就有著極多的問題需要深入研究并正確解決它們。 We must better understand the adaptation of plants to their environment.我們必須更清楚地了解植物對環(huán)境的適應性。