baby-sitter的复数是什么呢?babies-sitter or baby-sitters /why?

baby-sitter的复数是什么呢?babies-sitter or baby-sitters /why? a baby sitter is usually paid by ） hour 英语baby sitters rule As a baby sitter your duties will include putting the childr 翻译：He requires a baby sitter with experience in child care 求举例分析英语句子Television has become a baby-sitter,an introducer o baby复数是babys/babies baby的复数是什么 baby、class、sheep、ruler的复数是什么? baby的复数形式 baby 的复数 baby horse的复数