D is CAM wheel pole driving, spring automatic restore structure, tight structure, reasonable design, stable driving, dust discharge and dependable air lock.

D为凸轮连杆传动，弹簧自动复位机构，结构紧凑、设计合理、运转平稳，卸灰、锁气可靠。

youdao

The anger of the many educated but unemployed young people has been a driving force in the Arab Spring movement.

VOA: special.2011.05.27

As the spring and summer driving seasons gear up, the debate is bound to get hotter.

FORBES: Snowy Roads Aren't Putting a Damper on High Gas Prices

The A6 Buxton remains closed and there are hazardous driving conditions between the A53 Spring Gardens junction, in Buxton, and the A623 junction in Chapel-en-le-Frith.

BBC: Derbyshire snowy weather 'worst for 50 years'

Pretty good reason to spring for the Ultimate Driving Machine.

FORBES: Least Expensive Cars To Drive