back center造句

• I ( back center ) was with shenyang military district team in daqing , heilongjiang province
  1972年我在黑龙江大庆的照片（后排中间） ，那时候我在沈阳军区篮球队。
• It is believed , through analyzing , that the ratio radius of the crank to length of the link is importantly influential in the reed motion about 4 - linkage beating - up mechanism , and , that the specific property of slow motion at back center is mainly decided by the second 4 - linkage mechanism on the 6 - linkage beating - up mechanism
  对连杆机构运动分析认为：四连杆打纬机构的曲柄半径与牵手长度之比是影响筘座运动的重要因素，六连杆打纬机构的后心运动缓慢特性主要由第二个四连杆机构决定。