yo-yos

一种玩具,由带凹槽的球形或圆柱形线轴构成,线绕在槽内,用手指持线,以腕部动作使线轴上下运动。

A toy consisting of a spheroidal or cylindrical spindle having a circular groove in which string is wound; it is used by holding the string in the fingers and reeling the spindle up and down by movements of the wrist.

上下波动的动荡市场。

A volatile market that moves up and down.

一种空战机动:攻击者暂时以高度换取空速或反之,以快速追上目标或避免超越。

A dogfighting maneuver involving the attacker temporarily exchanging altitude for airspeed, or vice versa, in order to rapidly catch up with the defender or to prevent an overshoot.

一种布制玫瑰花结,用平针将圆形布料的外缘向中心收拢而成。

A cloth rosette formed by gathering the outside edge of a circle of fabric in toward the centre using a running stitch.