H: Provides help on syntax and options.

h：提供关于语法和选项的帮助。

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Use "h" to get help on using less.

使用“h”来获得less的使用帮助。

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In many children with A. D. H. D., these drugs can help the circuits function more normally.

对于许多患有注意缺陷多动症的儿童来说，这类药物的确可以使他们的神经回路更加正常地工作。

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With its diminutive footprint -- just a mere 128.6 mm (L) x 82 mm (W) by 9.9 mm (H), -- sleek design and recyclable aluminum enclosure, users now have a stylish drive to help them move, work and play with their digital content.

ENGADGET: Hitachi GST's G-Drive Slim: world's thinnest 2.5-inch external hard drive