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