To investigate the physical development status of the preterm low birth weight babies before they were 2 years old.
探讨早产低出生体重儿2岁以内的生长发育规律，为临床进行有效干预提供依据。
The physical development status of the low birth weight babies at 1 and 2 years old are inferior to the normal controls, the children's physical development status is affected by various factors.
低出生体重儿1岁及2岁时体格发育均落后于正常对照儿，儿童体格发育水平受多种因素的影响。
This paper introduces the chemical vapor deposition, Physical vapor deposition coating technology in the cutting tools of the status and development trend.
本文介绍了化学气相沉积，物理气相沉积等表面涂层技术在切削刀具中的应用现状与发展趋势。
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