运算很简单，但前提是记下代码，否则无法完整地在头脑中使用这种方法。

The math is pretty easy, but unless you memorize the codes, you won't be able to perform the entire technique in your head.

youdao

尽管这听起来很简单，但这是一种经过验证的方法，IBM Cloud环境就支持这种方法。

As simple as this sounds, this is a proven method and one which the IBM Cloud environment supports.

youdao

很显然，这种方法很糟糕，但是解决方法也很简单：永远不要将可变对象类型用作hashmap中的键。

Clearly, this approach is a pain but the solution is easy: Never use a mutable object type as a key in a HashMap.

youdao