voluntarily

adv.

志愿地；自动地，自发地；

1. Certainly one German bomber landed voluntarily in Devonshire.
   的确曾有一架德国轰炸机自动地在德文郡降落。
2. Two disciples voluntarily worked the final clean-ups in the rain, so the rest of us were spared from getting wet.
   两位弟子自动地在雨中作最后的清理工作，所以我们其他的人就免于被雨淋湿。

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Why Firms Comply Voluntarily with IAS: an Empirical Analysis with Swiss Data
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Voluntarily leaving an organization: An empirical investigation of Steers and Mowday's model of turnover.
The firing rates of human motoneurones voluntarily activated in the absence of muscle afferent feedback
Distribution in the visual field of the costs of voluntarily allocated attention and of the inhibitory after-effects of covert orien...