When you're building a list, you use the: operator, called the cons operator (for construct).

在构建列表时，使用：操作符，叫做构造(cons)操作符(用来构造)。

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There is talk now of building a natural gas storage facility there, the pros and cons of which are being hotly debated by business and environmental interest groups.

如今，有人提出在索罟建设天然气存储设施，这种做法的利弊引起了商界和环保人士的激烈争论。

youdao

There is talk now of building a natural gas storage facility there, the pros and cons of which are being hotly debated by business and environmental interest groups.

如今，有人提出在索罟建设天然气存储设施，这种做法的利弊引起了商界和环保人士的激烈争论。

youdao