张开to extend

• 展开画幅

  unroll a scroll painting

• 眼前展开一片广阔的田野

  an expanse of wide fields stretches out before one's eyes

• 这种新发明为生产展开了广阔的远景。

  This invention has opened up a new long-term future for production.

大规模进行to carry out

• 展开活动

  launch an activity

• 展开辩论

  carry out a debate

• 展开攻势

  take up the offensive

【数】to expand