该论证是双面的，同时服务于两种立场。
The argument is ___ambidextrous, serving two positions at once.
他双手都很灵活，是个真正的双手灵巧人士。
He's truly ___ambidextrous, being equally skilled with both hands.
他是个左右手都很灵活的人，可以同时用两只手写字。
He's ___ambidextrous and can write with both hands at the same time.
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