The control system sends out impulse dictates to drive three-coordinate manipulator with injection-gun to finish the accurate position orientation.

控制系统发出脉冲指令驱动三坐标机械手，带动注射枪完成定位加注。

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Background checks are widely considered the heart of the gun control drive.

NPR: Both Sides Hunt Support In Background Check Fight

Expanded background checks are the core of the Democratic gun control drive.

NPR: Senate Ready To Launch Gun Control Debate

And in Arizona, a staunchly pro-gun state where the 2011 assassination attempt of Rep. Gabrielle Giffords in Tucson left six dead and 13 wounded, the drive for gun control following Newtown has been a non-starter.

WSJ: Few states find narrow route to gun control laws