Select the Output element from the palette and place it below the price element.

从调色板中选择 Output 元素，并将其放在 price 元素的下面。

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If you know that a book has at most one price element, you can write the query using XQuery value comparisons, which force the comparison operands to be singletons.

如果知道某个book至多有一个price元素，则可以使用XQuery的值比较来编写查询，这迫使进行比较的操作数是单个数。

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For example, you could define a Price element that is always a floating-point number or a PersonName element that has FirstName and LastName sub-elements that are both strings.

例如，可以定义始终是浮点数的Price元素或具有字符串子元素FirstName和LastName的PersonName元素。

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Despite these headline negatives, the sector has performed very well in recent months, maintaining an element of price stability while continuing their double-digit dividend yields.

FORBES: Agency REITs Keeping Portfolios Safe During Volatility

While he said he had no reservations about adopting the target, Mr. Shirakawa warned against any belief that the central bank has sway over people's price expectations, a core element of reflationist thinking.

WSJ: Departing BOJ Governor Shares Doubts on New Policy

There is also a share-price discount for uncertainty, the biggest element of which is the extent of American military reprisals and what reaction, if any, that will prompt from Osama Bin Laden and his followers.

BBC: Analysis: What now for the world economy?