phosphorus combines easily with oxygen

例句：

1. 1.The soil in the garden is rich in phosphorus.
   花园里的土壤富含磷。
2. 2. The scientist used a sample of phosphorus to test the reaction.
   科学家用一份磷酸样本来测试反应。
3. 3. The plant needs phosphorus to grow.
   植物需要磷酸来生长。