问题是 product_type_data 块是 product.info 的子代(您实际复制的位置)它)，而不是 description 块.

The problem is that product_type_data block is a child of product.info (from where you actually copied it) and not description block.

因此，您要做的是将以下代码添加到主题的 local.xml 文件中:

So what do you have to do is to add the following code to local.xml file of your theme:

<PRODUCT_TYPE_simple>
    <reference name="product.description">
        <block type="catalog/product_view_type_simple" name="product.info.simple" as="product_type_data" template="catalog/product/view/type/default.phtml">
            <block type="core/text_list" name="product.info.simple.extra" as="product_type_data_extra" translate="label">
                <label>Product Extra Info</label>
            </block>
        </block>
    </reference>
</PRODUCT_TYPE_simple>
<PRODUCT_TYPE_configurable>
    <reference name="product.description">
        <block type="catalog/product_view_type_configurable" name="product.info.configurable" as="product_type_data" template="catalog/product/view/type/default.phtml">
            <block type="core/text_list" name="product.info.configurable.extra" as="product_type_data_extra" translate="label">
                <label>Product Extra Info</label>
            </block>
        </block>
    </reference>
</PRODUCT_TYPE_configurable>
<PRODUCT_TYPE_grouped>
    <reference name="product.description">
        <block type="catalog/product_view_type_grouped" name="product.info.grouped" as="product_type_data" template="catalog/product/view/type/grouped.phtml">
            <block type="core/text_list" name="product.info.grouped.extra" as="product_type_data_extra" translate="label">
                <label>Product Extra Info</label>
            </block>
        </block>
    </reference>
</PRODUCT_TYPE_grouped>
<PRODUCT_TYPE_virtual>
    <reference name="product.description">
        <block type="catalog/product_view_type_virtual" name="product.info.virtual" as="product_type_data" template="catalog/product/view/type/default.phtml">
            <block type="core/text_list" name="product.info.virtual.extra" as="product_type_data_extra" translate="label">
                <label>Product Extra Info</label>
            </block>
        </block>
    </reference>
</PRODUCT_TYPE_virtual>