In ASCII and data communication, a sequence of characters preceded by the start of heading character used as machine sensible address or routing information. 在ASCII码和数据通信中,以头标开始字符打头的一串字符,用作机器的可读地址或路由信息。
The ratio of purple leaf plants to green leaf plants in F 2 seedling stages obviously differed from that in F 2 heading stages, and therefore, purple character expressed progressively with different development stages; F2代苗期与抽穗期叶片紫绿分离比例明显不同,说明紫色性状的表现具有一定的阶段发育特点;
Cold heading steel is a kind of functional material used to manufacture constructional parts such as, bolts, nuts, screws, or pins etc., to which cold heading performance is an essential character. 冷镦钢是用于制造螺栓、螺母、铆钉、插销等紧固件的一种重要材料,冷镦性能是材料性能的重要指标。