There is a megalith in the middle of the river.这条河的河心处有块巨石....

megalith的音标：megalith的英式发音音标为：['megəlɪθ]megalith的美式发音音标为：['mɛɡəˌlɪθ]...

n.（尤指史前作石碑用的）巨石...