如果将属性声明为private并试图从类范围外部访问它(如清单7所示)，PHP引擎将抛出致命错误。

If you declare your properties private and attempt to access them from outside the class 'scope (as shown in Listing 7), the PHP engine will throw a fatal error.

youdao

美国有线电视新闻网的空中旅行专家理查得·卡斯特说这架双引擎飞机，有一个坚定的跨大西洋航线，并有着近乎完美的安全飞行记录，只是在1994年的一次飞行训练出现过致命事故。

CNN air travel expert Richard Quest said the twin-engine plane, a stalwart of transatlantic routes, had an impeccable safety record, with only one fatal incident involving a training flight in 1994.

youdao

引擎容量较大的摩托车、与重型车辆的碰撞、两车相向对撞等更容易引起致命的后果。

A fatal outcome was more likely to be associated with a larger engine capacity motorcycle, collision with a heavy vehicle, head on collision, and collision at a non-junction road.

youdao