There can be no side effects on immutable objects, and caching a reference to an immutable object is always safe from alias problems.

不可变对象上没有副作用，并且缓存不可变对象的引用总是安全的，不会出现别名问题。

youdao

Note that the method of the form is GET because performing a search has no side effects, and so GET is safe here.

请注意，该表单的方法是GET，这是因为执行搜索没有副作用，所以GET在这里是安全的。

youdao

And no matter how safe they are, all drugs have some unwanted or unintended side effects.

而且不过看起来安全性多高，所有药物都有潜在的副作用。

youdao

Although echinacea proved ineffective, the people who took it experienced no side effects of note, which suggests that the remedy is generally safe, says Michael Perskin, MD, an assistant professor of medicine at NYU Langone Medical Center, in New York City.

CNN: Echinacea fails to curb the common cold (again)