Those fears, it is argued, stem from a double squeeze on America's middle class.
这些担心，被认为是由于美国的中产阶级遭受双重打击。
New research finds that Ad-36 has a direct effect on human fat stem cells.
新的研究结果表明，Ad - 36对人类的脂肪干细胞有直接影响。
A spring on the valve stem tends to hold the valve on its seat (closed).
气门杆上的弹簧使气门保持在气门座上(关闭状态)。
Champagne flutes are characterized by a long stem with a tall, narrow bowl on top.
香槟酒杯的特点是有很长的杯脚和很窄的杯体。
Champagne flutes are characterized by a long stem with a tall, narrow bowl on top.
香槟酒杯的特点是有很长的杯脚和很窄的杯体。
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