O power and describes the P. T. O test bench and the procedures for determining the rated P. T. O power of Shanghai-50 Tractor.

介绍了拖拉机动力输出试验台及上海-50拖拉机动力输出轴标定功率的制订过程。

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Because investors had several years' experience that had taught them corporate bonds were a sound investment even if they weren't top-rated credits.

FORBES: Dow Jones Interactive

California argued that the voluntary system isn't good enough, because some minors manage to purchase mature-rated games anyway, and some publishers don't submit games to the ratings board.

WSJ: High Court Strikes Down California Videogame Law

In the study, the relative handful of smoking scenes in G- or PG-rated movies didn't appear to influence a child's likelihood of trying cigarettes.

CNN: Should smoking trigger an R rating?