\u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
1. 轮作：change 变化 | change of crops 轮作 | change of function 机能更换
2. 换茬：change of control ==> 功能控制改变 | change of crops ==> 换茬 | change of denomination ==> 票面金额变更