producing a new tree

例句：

1. 1. The company is producingnew products to meet market demand.
   该公司正在生产新产品以满足市场需求。
2. 2. The scientist is producinga new drug for the treatment of cancer.
   这位科学家正在生产一种新药来治疗癌症。
3. 3. The engineer produced a model ofthe new bridge before it was completed.
   工程师在桥梁完工之前制作了这座新桥的模型。