An infant born to a hunter-gatherer society could have more than ten caregivers - this contrasts starkly to nursery settings in the UK where regulation can allow for a ratio of one carer to four children aged two to three.
一个在采集狩猎社会中出生的婴儿可能拥有超过十位照顾者——这与英国的托儿所环境形成鲜明对比，在英国托儿所的监管规定允许每名照顾者照顾两名至三名年龄在两到三岁的儿童。
The randomised control trial involved hundreds of year 5 pupils—aged nine and ten—at 45 state primary schools that had not been "previously exposed to RSC pedagogy".
这项随机对照试验涉及45所未' previously exposed to RSC pedagogy '（此前未接触过RSC教学法）的公立小学中数百名五年级学生，这些学生年龄为九到十岁。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。