如何讓花束永遠保持新鮮？

         Researchers found that a spray of a solution containing thidiazuron, or TDZ, kept leaves and petals looking fresh and healthy for days longer than usual.

　　研究者們發(fā)現(xiàn)，這種噴霧中含有一種叫“脫葉靈”的物質，也可以稱作“TDZ”，它可以使葉子和花瓣看著比它們能保持的時間更新鮮。