Pesticides can harm beneficial insects if used excessively.

如果过量使用，杀虫剂会伤害有益的昆虫。

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。