Firstly, the structure and the working principle of a new pump well indicator based on the microchip 89C51 are introduced in this paper.是什么意思_Firstly, the structure and the working principle of a new pump well indicator based on the microchip 89C51 are introduced in this paper.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句