【英语时差8,16】货币兑换

Money Changers Ever wonder how a money changer machine knows if you've given it a one, a five or a ten dollar bill? When a bill is inserted into a money changer machine, it disrupts a light beam from within the machine. This action triggers the motor to pull the bill into the money changer. The machine then begins a procedure by which it first makes sure the bill is actual currency and then determines the denomination¹ of the bill. With a computer chip and measuring devices, the money changer checks the length, width and thickness of the bill. If the bill is not the exact length and thickness it should be, the changer will reject it and refuse to give you any change. The sensors² that evaluate the bill are so sensitive that even an old, wrinkled bill usually will not pass this authenticity³ test because it will not measure precisely⁴ the same as a crisp, new bill. After the machine measures the bill’s width, length and thickness, it optically scans the bill to determine if it is a one, five, or ten dollar bill. The machine makes this decision by “reading” how much ink is in different places on the bill. The U.S. treasury⁵ department uses specially⁶ manufactured ink that has unique magnetic properties. The machine’s optical scanner measures this magnetic ink. And because a one dollar bill has a different ink pattern than a five or ten dollar bill, the computer inside the machine is able to differentiate⁷ between these denominations⁸ with a quick scan.

1 denomination   

n.命名，取名，(度量衡、货币等的)单位

参考例句：

• The firm is still operating under another denomination.这家公司改用了名称仍在继续营业。
• Litre is a metric denomination.升是公制单位。

2 sensors   

n.传感器，灵敏元件( sensor的名词复数 )

参考例句：

• There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
• Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时，有很大变化。 来自辞典例句

3 authenticity   

n.真实性

参考例句：

• There has been some debate over the authenticity of his will. 对于他的遗嘱的真实性一直有争论。
• The museum is seeking an expert opinion on the authenticity of the painting. 博物馆在请专家鉴定那幅画的真伪。

4 precisely   

adv.恰好，正好，精确地，细致地

参考例句：

• It's precisely that sort of slick sales-talk that I mistrust.我不相信的正是那种油腔滑调的推销宣传。
• The man adjusted very precisely.那个人调得很准。

5 treasury   

n.宝库；国库，金库；文库

参考例句：

• The Treasury was opposed in principle to the proposals.财政部原则上反对这些提案。
• This book is a treasury of useful information.这本书是有价值的信息宝库。

6 specially   

adv.特定地；特殊地；明确地

参考例句：

• They are specially packaged so that they stack easily.它们经过特别包装以便于堆放。
• The machine was designed specially for demolishing old buildings.这种机器是专为拆毁旧楼房而设计的。

7 differentiate   

vi.(between)区分；vt.区别；使不同

参考例句：

• You can differentiate between the houses by the shape of their chimneys.你可以凭借烟囱形状的不同来区分这两幢房子。
• He never learned to differentiate between good and evil.他从未学会分辨善恶。

8 denominations   

n.宗派( denomination的名词复数 )；教派；面额；名称

参考例句：

• Christians of all denominations attended the conference. 基督教所有教派的人都出席了这次会议。
• The service was attended by Christians of all denominations. 这次礼拜仪式各教派的基督徒都参加了。 来自《简明英汉词典》