Southern Cross uses nature as a teaching tool.

南十字星座利用自然作为教学工具。

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Thus for parents who value service, housework is an important teaching tool.

因此对崇尚服务的家长而言，做家务是重要的教育工具。

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Rappaport describes in Her Wake as not only a conduit of love and healing, but as a teaching tool as well.

Rappaport把《苏醒》不仅描述为爱与治疗的通路，而且还视作教学工具。

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But we're saying there must be comprehensive responsible gaming and problem gambling education if you're using it as a teaching tool.

WSJ: School Club's Success Cheers Poker's 'Mind Sport' Champions

They realized their experience as patients would be a valuable teaching tool.

NPR: Medical Lesson: Learning to Relate to Patients

Penny Chisholm, a professor of environmental science at MIT, said she'd welcome the chance to use a GZA album as a teaching tool.

WSJ: GZA on 'Dark Matter' Album - Interview: Rapper Finds Muse in the Stars