The use of heavy machinery has reduced the need for manual labor.

重型机械的使用减少了对体力劳动的需求。

同一单元的其他句子

• The farmers are working the land to plant rice this season.农民们正在田地里劳作，这个季节要种水稻。
• Modern agriculture uses technology to improve crop yields.现代农业利用技术来提高作物产量。
• Have you ever considered the importance of soil conservation?你考虑过土壤保护的重要性吗？
• The use of pesticides can harm the environment and human health.使用杀虫剂可能危害环境和人类健康。
• Organic farming avoids synthetic chemicals and promotes natural methods.有机农业避免使用合成化学物质，提倡自然方法。