根據(jù)所給中文完成句子：
Although we ______ have a need for REM sleep,___from the fact that our bodies automatically _______ for a loss of it, ____ REM sleep actually does for us is not clear.
[參考譯文]
從我們的身體能夠自動(dòng)地對損失作出補(bǔ)償這個(gè)事來看，盡管我們明顯地需要REM（ Rapid eye movement）睡眠，但REM睡眠對我們的身體有什么作用還不清楚。
Although we ______ have a need for REM sleep,___from the fact that our bodies automatically _______ for a loss of it, ____ REM sleep actually does for us is not clear.
[參考譯文]
從我們的身體能夠自動(dòng)地對損失作出補(bǔ)償這個(gè)事來看，盡管我們明顯地需要REM（ Rapid eye movement）睡眠，但REM睡眠對我們的身體有什么作用還不清楚。