Let's ignore the more complex options and just look at the basic syntax of a regular expression. Here are some examples.

让我们忽略较复杂的选项，只关注正则表达式的基本语法。

youdao

When you have more than two options, a decision gets complex.

当你有两种以上的选择的时候，做决定就会变得复杂。

youdao

This frees the developer from tinkering with complex configuration options at the initial get-go and allows him or her to experiment immediately with the template engine.

这就避免了开发人员从一开始就忙于复杂的配置选项，让他们能马上体验到这种模板引擎。

youdao

Many niave widowed and otherwise untrained individuals are to be asked to choose between complex coverage options, and deal with slick talking salesman, and fine print that may be deceptive.

FORBES: Why Newt Could Win Florida

For example, if a company is shipping products internationally, but still needs to guarantee delivery to receive full payment or to maintain contractual obligations, it faces a potentially complex set of options to complete the delivery.

FORBES: Risk Analytics: Insights for Chemicals Companies

These are advanced options strategies that often involve greater risk, and more complex risk, than basic options trades.

FORBES: Don't Choke On This Options Strategy: The Strangle