Within a decade, people began actually marking OK on documents and using OK on the telegraph to signal that all was well.
在10年内，人们开始真正把OK写入文件，并且在电报用OK表示一切平安。
Insect host marking pheromones are chemical compounds produced by females and deposited on or into hosts to signal the presence of conspecific brood.
昆虫寄主标记信息素是指由昆虫产生的用来标记寄主上有同种个体存在的化学物质。
Used as marking or signal alarming for building top or surround.
作为建筑物顶部四周标志或信号报警之用。
应用推荐