familiar example的用法和樣例：
例句
- Pollution is a common example of an externality that leads to market failure.
污染是外部性導致市場失效的一個常見的例子。 - The most common example of a machine element is a gear, which, fundamentally, is a combination of the wheel and the lever to form a toothed wheel.
機械元件最常見的例子是齒輪，從根本上說，齒輪是輪子和杠桿的一種集合形成一個齒形的輪子。 - Compu-ers are a familiar example.
電腦是一個大家熟悉的例子。
