一只大天鹅挥舞着双翅，似乎在炫耀性的展示自己的成功。
（2007年7月31日下午）当时他们（研究人员）在附近徘徊，希望从她（指那只奇特的海豚）身上获取活组织检查样本。 这只海豚先是潜到水里，过了一会嘴上固定着一只海螺浮出水面，她在水上面来回挥舞着海螺。
As they lingered nearby, hoping to dart a biopsy sample from her skin, the dolphin dived and then surfaced with her beak lodged in a conch shell, which she waved back and forth above the water.
他用一只脚平衡着两吨重的机器，手臂用力而又优雅地挥舞着。
He balances the two ton machine on one foot while sweeping the arms in strong, graceful arcs.
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