He therefore had to match his sample of families with the much bigger sample in the official household survey carried out by the National Bureau of Statistics.
因此，他将这些家庭样本与样本数较大的国家统计局进行的官方家庭调查进行比对。
2
First, fill in the Doping Control Official Record clearly and choose a perfectly clean cup to collect urine sample no less than 75ml.
首先，清楚地填写兴奋剂检查记录单。然后拿一个彻底清洁的尿样瓶去留75毫升尿。
3
"Sample tests show no problems with our oil, " an official from Sinopec said.