短语词组短语hold breath out 保持呼气hold -out sample 保留样本Hold -Out Method 其实严格意义来说hold d out 坚持;维持;提出;伸出hold himself out as 显示自己为Robust Data Hold -out 件的数据延伸算法hold itself out to be 显示它是willmigerl hold himself out as 显示自己为 返回 hold out