Studies in countries such as Ghana and Cameroon suggest many girls at secondary school miss a week of classes when they have their period, or drop out altogether when they reach puberty.

在加纳和喀麦隆等国家开展的研究显示，许多女中学生在例假期间一个星期不去上学，当她们进入青春期，有的甚至辍了学。

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If the user selects a retention period longer than 60 days in the drop-down, an additional field will be displayed for the user to select an approver (see figure 7).

如果用户在下拉框中选择一个大于60天的保持期，将向用户显示一个附加的对话框，要求用户选择批准人(参见图7)。

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Even the American market leader, General Electric, reported a sharp drop in third-quarter turbine sales, compared with the same period last year.

甚至美国的电力市场领先者通用电力在第三季度的电机销售量与去年同期相比大幅度下降。

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According to the Commerce Department, foreign direct investment in the U.S. did indeed drop for a period after 2001, but has generally been on the rise since 2003, increasing 67% in 2006.

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The bearish percentage has seen a 12% drop during the same period.

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That's not only more than a 50 percent drop from last quarter, but a 27 percent drop from the same period last year.

ENGADGET