Helen Chen

The ridges on the sides of coins are called reeding or milling. A dime has 118 ridges around the edge. A quarter has 119 ridges. 

硬币侧面的脊被称为芦苇或铣削。 十分錢硬币边缘周围有118个脊。25分錢硬币有119脊。

How valuable is the penny you found lying on the ground? If it takes just a second to pick it up, a person could make $36 per hour just picking up pennies. 

你知道掉在地上的一分钱硬币有多少價值？ 如果撿起它只需一秒钟，一个人可以每小时在地上撿到總共有36美元的一分錢硬币。

On the new U.S. $100 bill, the time on the clock tower of Independence hall is 4:10. 

在新的100美元鈔票上，独立厅钟楼圖像的时间是4:10。

The Austrailian $5, $10, $20, $50 and $100 notes are made of plastic. 

澳大利亚 5美元、10美元、20美元、50美元和100美元纸币是塑料做的。

The face of a penny can hold thirty drops of water. 

面对一分钱硬币可以容纳三十滴的水。

The first coins issued by authority of the United States government were minted in 1787. These pennies were inscribed with the plainspoken motto, "Mind your own business."

美国政府鑄造的第一枚硬币是在1787年制造的。这些一分錢的硬币上面刻有普通口号，“注意自己的事业”。

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