import substitute and export substitute

例句：

1. 1.We need to import more machinery to improve our production efficiency.
   我们需要引进更多的机器来提高我们的生产效率。
2. 2. The company is planning to import new technology from abroad.
   该公司计划从国外引进新技术。
3. 3. Imported goods are subject to customs duties and taxes.
   进口商品需要缴纳关税和税收。
4. 1. He used a substitute for the missing pen.
   他用一支笔的替代品来代替那支丢失的笔。
5. 2. The doctor prescribed a substitute for his pain medication.
   医生开了一种替代他疼痛药物的药物。
6. 3. Substitutes are often cheaper than their original counterparts.
   替代品通常比它们的原始替代品便宜。