leading men男主角leadingadj.领导的；指导的；主要的；在前的leading water engineering引水工程leading-phase operation进相运行leading action of the hip髋前伸动作leading edge mesial point前沿中间点leading-edge technology尖端技术leading frame copper alloy电子引线框架铜合金leading- phase operation进相运行leading economic indicator[经] 领先经济指标leading seismic prediction地震超前预报leading-in of new lesson新课导入

1. Rice is the chief crop in most southern provinces.
   稻子是大多数南方省份的主要作物。
2. Triticum aestivum is the second most important crop in China and its production and quality are directly linked with both international and domestic affairs.
   小麦是我国第二大主要作物，其产量与品质直接关系到国计民生。