You could see the occasional solitary figure making a study of wildflowers or grasses.
你偶尔可以看见那个研究野生花草的孤独身影。
Light drinking during pregnancy 'does children no harm 'study reporting on group now aged five says none suffered as a result of their mothers having an occasional drink while pregnant.
一个对一组现已5岁的孩子的研究报告称,其中的研究对象没有因其母亲在怀孕期间偶尔饮酒而受到伤害。
A separate study, also published in "sleep", showed that an occasional long lie-in can be beneficial for those who can't avoid getting too little sleep.
发表在期刊“睡眠”上的另一个研究表明,偶尔的赖床对这些不能避免睡得太短的人有益。
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