Aim: to study the functions of nerve growth factor in human developing teeth.
目的：探讨神经生长因子在牙齿发育中的作用。
Doctors already know that obesity is a risk factor for developing heart disease.
临床医师业已明确，肥胖是心脏病发病的一项危险因素。
The crucial factor of this technology is the developing of the sending and receiving system.
该技术的关键之一为无线电磁波发射和接收、处理系统的研制。
The crucial factor of this technology is the developing of the sending and receiving system.
该技术的关键之一为无线电磁波发射和接收、处理系统的研制。
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