柯林斯词典shale /ʃeɪl/ (shales) 1. N-MASS Shale is smooth soft rock that breaks easily into thin layers. 頁巖; 泥板巖 返回 shale剑桥词典a type of soft , grey rock , usually formed from clay that has become hard, that breaks easily into thin layers 頁巖 返回 shale