The possible values for the speed attribute are slow, moderate, and fast.

speed 属性的可能值有 slow、moderate 和 fast。

youdao

Our poplin is fine in quality and moderate in price. Therefore it meets with a favorable reception in most of European countries and sells fast.

我们的府绸品质优良，价格公道，深受大多数欧洲国家欢迎，销售很快。

youdao

The US Federal Drug Administration (FDA) fast-tracked the study after patients seemed to show signs of mental improvement from even moderate doses of the drug.

美国FDA 快速跟踪该研究，服用中度剂量药物的患者似乎就出现了精神改善的迹象。

youdao

At the same time, they must be sensitive enough to transform even weak TV signals into clear images and function in sheltered places, like garages, and at moderate speeds, such as on trains or in fast-moving cars.

FORBES: Tuning In Mobile TV--Chinese Style