The output direct feedback controller design and simulation results of a nonlinear mass-spring-damper mechanical system show that these methods are effective.

通过对一个非线性质量块-弹簧-阻尼器系统输出反馈控制器的设计和计算机仿真，验证了方法的有效性。

youdao

Separate studies show that an FTTH infrastructure can have a direct impact on local economic output, said Mr Helsen.

BBC: Home fibre plans survive downturn

Pure Direct mode can also be selected for higher quality audio output.

ENGADGET: Yamaha's CD-N500 network CD player comes to the States, priced at $800

CSFB's figures almost certainly exaggerate the direct impact of the attacks, not least since any lost output will partly be offset by more spending on rebuilding, security and defence.

ECONOMIST: World economy