American engineer who built (794-804) the Middlesex Canal in Massachusetts and developed the Baldwin apple. His son Loammi (780-838) designed canals and the Bunker Hill Monument.是什么意思_American engineer who built (794-804) the Middlesex Canal in Massachusetts and developed the Baldwin apple. His son Loammi (780-838) designed canals and the Bunker Hill Monument.在线翻译_英语_读音_用法_例句