重叠式短语

英语重叠式短语

英语重叠式短语。·all day and all night整日整夜。·neck and neck并驾齐驱；难分高低。·one by one一个接一个地。·side by side肩并肩；一个接一个。·step bystep按部就班；逐步。·up and do