如果这些方法都不奏效，你还可以利用镜头上的距离标示来手动对焦（以及合适的超焦距）。
If all these approaches are impractical, one could always resort to manual focus using distance markings on the lens.
要确保对链中所有类的正确初始化，实现者必须手动编写超类方法调用的代码，如清单 11 所示。
To guarantee the correct initialization for all the classes in the chain, the implementer must manually code the superclass method invocation as shown in Listing 11.
很显然我们的读者们都是纯粹主义者，因为相比那个牛逼哄哄的高科技产品430 Scuderia来说，他们更倾心于一辆5档手动，而且没有牵引力控制系统的超跑。
Apparently our readers are purists, preferring a super car with a 5-speed manual and without traction control to the high-tech gew-gaws of the 430 Scuderia.
应用推荐