preliminary to在 ... 之前preliminaryadj.初步的；预备的；开始的n.初步行动；准备；初步措施preliminary contract预备契约书preliminary hearings预审preliminary exercise预备运动preliminary steeping预浸preliminary leaching初步浸出preliminary checkout预备测试preliminary election初选preliminary roasting预焙烧preliminary thinning疏伐,抚窗伐preliminary grouting预注浆