semi-determinate varieties

例句：

1. 1. The plant breeders are working on developing new semi-determinate varieties for the market.
   植物育种者正在努力开发新的市场可用的半确定品种。
2. 2.These semi-determinate varieties have been shown to be more resistant to pests and diseases than their non-determinate counterparts.
   这些半确定品种已被证明比它们的非确定品种更能抵抗害虫和疾病。
3. 3. In agriculture, semi-determinate varieties are often used in crop rotation systems to ensure a balanced supply ofnutrients throughout the year.
   在农业中，半确定品种常用于作物轮作系统中，以确保全年均衡供应养分。