elementUI el-table的scope.row怎么理解

Question

<el-table :key='tableKey' :data="list" v-loading.body="listLoading" border fit highlight-current-row style="width: 100%">  <el-table-column align="center" label="序号" width="65">    <template scope="scope">      <span>{{scope.row.id}}</span>    </template>  </el-table-column>这个写法怎么的scope.row是什么写法呢