tracts怎么读？

Vast tracts of the country are wild and undeveloped...乡间大片大片的荒地尚未开发。Each sequence is made of transgressive system tracts and highstand system tracts.认为娄山关组由7个三级层序组成,层序界面为古岩溶不整合面或暴露带,每个层序都由海进体系域和高水位体系域构成.Large tracts of w...

n.大片土地( tract的名词复数 )，地带，（体内的）道，（尤指宣扬宗教、伦理或政治的）短文...

Vast tracts of the country are wild and undeveloped.乡间大片大片的荒地尚未开发。vast tracts of forest大片大片的森林There are tracts of desert in Australia.澳大利亚有大片沙漠....