还有许多人正在尝试完善超声波技术，以便能确定骨骼的力度和弹性。
And a number of people are attempting to perfect ultrasonic techniques to deter - mine the strength and flexibility of bones.
就业岗位不足、就业制度不完善、就业弹性降低等问题已经成为阻碍城市化进程的重要因素。
Insufficient job opportunity, imperfect employment and reduction of employment flexibility have become the important factors of hindering urbanization.
作者进一步完善了弹性接触条件的处理方法，使接触问题的收敛性大大提高，同时还提出了分级加载的计算方法，这就使接触问题的理论更加完善。
The author has brought the theory of elastic contact to a better completion by raising the convergency of the contact problem. A method of classified loading in computation is also introduced.
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