The possible values are upper case first (u), lower case first (l), and off (X).

可能的值是大写优先(U)、小写优先(L)和关闭(X)。

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Methods: The thickness of enamel and dentin at different positions of 23 upper first and 18 lower first molars were measured by electronic ruler.

方法：用电子测量尺测量23颗上颌第一磨牙和18颗下颌第一磨牙牙合面不同部位牙釉质、牙本质的厚度。

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The cooling device comprises a first heat exchanger with a first stepped box, and the first box comprises a first upper part and a first lower part.

该冷却装置包括具有阶梯形第一箱体的第一热交换器，所述第一箱体包括第一上部箱体部分和第一下部箱体部分。

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About 5, 200 years ago, the first pharaoh managed to unify Upper and Lower Egypt into a single state with Memphis as its capital.

UNESCO: Learning from ancient droughts

Even though large cap stock market averages are nearly 7% higher than they were at the start of the year, they have spent the first eleven months of 2010 bouncing from the lower to the upper bands of a sideways trading range.

FORBES: Who's Making Money In This Sideways Market?

Korean Air gets around that by designating the entire upper deck (94 seats) as business class, plus 12 first class suites and 301 economy class seats on the lower deck.

FORBES: The Newest A380: 407 Passengers Or 35 Million Ping-Pong Balls