For Special Attention
ring something up = to make a machine record its price. — 让收银机记录下商品的价格。
scan a bar code = to shine light quickly on it. — 快速用光线照在条形码上。
change = the money you give the cashier is more than the total price; the difference is your change. — 你付给收银员的钱超过应付总额,多出的部分就是找零。
code = a set of symbols that has a meaning; usually this meaning is clear only if you have special knowledge. A bar code uses dark bars as its symbols; an approval code uses numbers. — 一组有含义的符号,通常只有具备专业知识的人才能看懂。条形码用深色线条作符号,授权码用数字。