A curved runner under a rocking chair or cradle enabling motion.

摇椅或摇篮底部的弧形滑木，使其能摇动。

A rocking chair.

摇椅。

The lengthwise curvature of a surfboard.

冲浪板的纵向弧度。

A musician who plays rock music.

• A devoted fan of rock music.

摇滚乐手。

• 热衷摇滚的人。

A member of the 1960s British subculture opposed to the mods.

20世纪60年代英国“Rocker”亚文化成员，与摩登族对立。

A device or machine operating with a rocking motion, e.g., a gold-washing rocker.

具有往复摇动机构的装置或机器，例如淘金摇槽。

A toothed tool that roughens a plate to create mezzotint texture.

带细齿的工具，用于在金属板上起毛以作黑画法。

A spring-loaded electrical switch that rocks between positions.

在两端间翘动的弹簧式翘板开关。