英语
西班牙语
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单语范例（未经PONS编辑处理）
When the expected stable frequency of the scrounger tactic was altered by changing the availability of seeds, the relative frequency of hopping with the head up changed accordingly.
en.wikipedia.org Producers benefit when scroungers are rare.
en.wikipedia.org Is it rich scroungers, whose banks were bailed out by government cash, or poor scroungers, whose lifestyles are propped up by government welfare?
blogs.telegraph.co.uk The next day, the scrounger will follow the successful bird to the patch.
en.wikipedia.org A bird can be a scrounger.
en.wikipedia.org