She danced the principal role in the ballet.

她在这个芭蕾舞中担任主角。

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The personality, experience, and emotion play the principal role in choosing art patterns for artists.

艺术家的个性、经历和情感在艺术家对艺术样式的选择中起了不可忽视的作用。

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These approaches emphasize language learners' principal role and thus reflect the general rules of language learning.

这一教学方法强调语言学习者的主体地位，反映了语言学习的一般规律。

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Its principal role, once a dispute is under way, is still to act as referee while two or more governments fight it out.

ECONOMIST: Who elected the WTO?

Through such studies UNESCO is conceiving a dynamic role of its Islamabad office in not only policy formulation at state level but capacity building and strategy implementation at the local, to fulfill its principal role of facilitator and valuable partner in attaining country's prosperity.

UNESCO: NATURAL SCIENCES

Two of the school's 12 teachers take on administrative duties as "lead teachers, " performing the traditional role of a principal.

CNN: Teacher turns 'crazy idea' into new school