戴妮拉。麦克莱恩，现年28岁，在告知老板自己怀孕前，已怀孕13周，扫描仪上已能够看到胎儿。
Danniella McClain, 28, waited until she reached the 13-week milestone and had seen the foetus on a scan before telling her boss.
不戴活动监测仪的人平均比两年前轻了大约13磅。
Those who had not worn activity monitors were, on average, about 13 pounds lighter now than two years ago.
用戴安dx - 120型离子色谱仪测定大气颗粒物中的阴离子，并对其分析过程进行研究。
Anion in Air Granule is determined by DX-120 chromatographic instrument and analysis process is studied in this paper.
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