What is complementary distribution? 什么是互补分布?请帮忙给出正

正确答案：When two sounds never occur in the same environmentthey are in“complementary distribution”．For examplethe aspirated English stops never occur after[sand the unaspirated ones never occur initially．Sounds in complementary distribution may be assigned to the same phoneme．The allophones of[lfor instanceare also in complementary distribution．The clear[loccur only before a vowelthe voiceless equivalent[loccur only after a voiceless consonant． 它指两个音从不出现在同一语音环境里的状况。例如英语里的送气爆破音从不可能出现于[s音之后不送气的爆破音也不可能出现于音节之首。处于互补的音是作为同一音位看待。例如[l的不同音素就处于互补分布状态。清晰的[l只出现在元音前而[l的清音形式只出现清辅音之后。
Whentwosoundsneveroccurinthesameenvironment,theyarein“complementarydistribution”．Forexample,theaspiratedEnglishstopsneveroccurafter[s,andtheunaspiratedonesneveroccurinitially．Soundsincomplementarydistributionmaybeassignedtothesamephoneme．Theallophonesof[l,forinstance,arealsoincomplementarydistribution．Theclear[loccuronlybeforeavowel,thevoicelessequivalent[loccuronlyafteravoicelessconsonant．它指两个音从不出现在同一语音环境里的状况。例如,英语里的送气爆破音从不可能出现于[s音之后,不送气的爆破音也不可能出现于音节之首。处于互补的音是作为同一音位看待。例如,[l的不同音素就处于互补分布状态。清晰的[l只出现在元音前,而[l的清音形式只出现清辅音之后。