modeling of the soil nitrogen cycle

例句：

1. 1. The scientist is modelingthe new device to test its performance.
   科学家正在对新设备进行建模，以测试其性能。
2. 2. The engineer is modelingthe new building to ensure it meets allsafety standards.
   工程师正在对新建筑进行建模，以确保它符合所有安全标准。
3. 3.The artist is modeling a sculpture usingclay.
   艺术家正在用黏土进行雕塑建模。