It’s a non-ionizing type of electromagnetic radiation, as opposed to the ionizing radiation used in radiation therapy, for example.
不过，有别于化疗时的电离辐射的是，手机辐射是非电离性的。
2
The dynamic type of an object (as opposed to a reference or pointer) is always the same as the static type of the object.
对象的动态类型总是与静态类型相同，这一点与引用或指针相反。
3
For convenience, we'll use the word "type" in this section to refer to classes and traits generically, as opposed to referring to member type declarations.