"Nature gave us lips to conceal our teeth," ran one popular Victorian maxim, alluding to the fact that before the birth of proper dentistry, mouths were often in a shocking state of hygiene.

维多利亚时代流传着一则箴言：“造物主赋予人类嘴唇以遮掩牙齿”。这暗示了在严格意义上的牙科学诞生之前，口腔的卫生状况往往非常糟糕。

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One way of making things simpler is to hide or conceal advanced functionality.

使设计更加简化的方法之一是隐藏高级的功能控件。

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Apple also said that one of its factories had repeatedly falsified its records in order to conceal the fact that it was using child Labour and working its staff endlessly.

苹果同样表示它的一家工厂经常篡改记录来掩盖使用童工和使工人没完没了工作的事实。

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We do not conceal those. But we agree on one thing: we need to do our best in order to achieve stability there,"

VOA: standard.2009.05.07

In this connection, high priority must be given to improving the United States' ability to attack and destroy deeply buried assets -- one approach taken by the North Koreans to conceal and harden some of their nuclear weapons-related manufacturing sites.

CENTERFORSECURITYPOLICY: Center For Security Policy

One was seen with a T-shirt draped over a shoulder a technique to conceal the arm and detectives followed, watching one suspect fail to open a woman's purse.

WSJ: Pickpockets: The Low-Tech Security Risk

No president in modern times has managed to conceal so much of his biography as this one.

CENTERFORSECURITYPOLICY: "Never Again," Obama Style