许多国家在面包中加入叶酸，以增进人们(尤其是孕妇)对叶酸的摄入量。On top of this, pregnant women may be consuming a similar amount of folic acid from supplement pills. 除了从食物中，孕妇们往往还从补药中获取叶酸。(From Economist, August 27, 2009: On the pill)
on top of sth: in addition to sth.
*He gets commission on top of his salary.
*On top of everything else, my car’s been stolen.
Wednesday 2 September 2009
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