In printing, a small overlap where two colours meet to safeguard against a gap which might otherwise occur due to a lack of register. 在彩色套印技术中，两种颜色接合处的一小点儿重叠，为防止由于套准不好而可能出现的间隙。参阅register。
We make copies of our computer disks as a safeguard against accidents. 我们复制了计算机磁盘以防意外。
