The most common U. S. coin is the penny.

最普通的美元硬币是便士。

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With this method, the team used the device to scan and create a 3-D image of the "hills and valleys" on the front face of a U. S. penny -- with micron-level resolution -- from half ameter away.

借助此方法，设备在0.5米远的地方就能够清晰地扫描一美分硬币正面“错落有致的花纹（林肯头像）”，并创建其三维图像，而且分辨率达到微米级。

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Penny "s brain teaser this morning."

我在想佩妮早上说的脑筋急转弯。

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One of Penny's high school coaches, Michael Toney, had talked with Penny throughout his NBA career.

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Katie Rager, Penny's longtime friend, says Penny was simmering with anger when they became friends.

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Recycling is tricky: just half a penny's worth of neodymium helps a mobile phone vibrate.

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