This is most commonly done by placing leaf litter on a screen over a large funnel, often under some heat.

最常见的做法是把落叶放在一个大漏斗之上的筛子里，通常在一定的温度下进行。

youdao

To me, throwing litter all over the park is very annoying.

对我来说，在公园里乱丢垃圾真是讨厌。

youdao

Of course, they over winter and probably more naturalized habitats under rocky areas and things like that, leaf litter, that sort of thing, but certainly homes are also on the list for them.

当然它们会很自然的选择在石堆缝里或落叶下面这些地方越冬，但我们的家也在它们的选择范围之内。

youdao

The lack of standards for deep water drilling risk management will spawn a litter of over-reaching regulation.

FORBES: The BP Oil Spill: Unexpected Consequences

Litter is scattered over the streets around Issac Sheppard school in north Philadelphia.

BBC: Obesity rates fall in Philadelphia

Some wore it pinned up for church, because of the heat, but before it was over hairpins would litter the floor.

NPR: Excerpt: 'The Prince of Frogtown'