Drum brakes have more parts than disc brakes and harder to service, but they are less expensive to manufacture, and they easily incorporate an emergency brake mechanism.

鼓式制动比盘式制动的零件多，维护也更困难，但鼓式制动造价便宜，且易于与紧急制动机构配合。

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The service and emergency brakes are powered by their own hydraulic pack .

维修停车和紧急刹车由他们自己的液压组件提供动力。

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The engine has had a full service and the brakes are working well again.

发动机作了全面维修，而且刹车系统现在也运转得很好。

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My service technician told me that this is the way those brakes work.

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Nominet, the organisation that oversees UK web addresses, has put the brakes on plans to launch an optional new service for sites ending with ".uk".

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Unfortunately, if the brakes aren't fixed soon, this online delivery service will hit a wall.

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