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Therefore, you must pass it a root element when you create it.
因此，创建 Document时，必须给它传递一个根元素。
youdao
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The heart of lotus root is vacuum, also has several soft silks pass through.
莲藕内心是真空之所，也有根根柔丝穿过。
youdao
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The heart of lotus root is vacuum, also has several soft silks pass through.
莲藕内心是真空之所，也有根根柔丝穿过。
youdao