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真题原句共 2 句
n. 比，比率2 次
An infant born to a hunter-gatherer society could have more than ten caregivers — this contrasts starkly to nursery settings in the UK where regulations call for a ratio of one carer to four children aged two to three.
出生在狩猎采集社会的婴儿可能有十多位照料者——这与英国的托儿所形成了鲜明对比，英国的规定要求，对于两到三岁的儿童，照料者与儿童的比例为一比四。
They ought to improve their carer-to-child ratio.
它们应该提高照料者与儿童的比例。