The locals were encouraged to trap and kill mice to stop the spread of the virus.

当地人被鼓励用捕捉器捕杀老鼠以阻止病毒的传播。

《柯林斯英汉双解大词典》

When the bees walk through the trap they pick up some of the powder which is then spread around the hive.

BBC: NEWS | Science/Nature | Sticky bees combat insect pests

It aims to trap toxic free radicals, the highly reactive molecular fragments that are believed to spread damage several hours after a stroke.

FORBES: Brain Repair