记号 jìhao HSK7 mark Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: notation All meanings 4 jìhao 4 mark 3notation 1 1 sentence for 记号 (jìhao — notation) 这种数学记号在教科书中非常常见。 zhè zhǒng shùxué jìhao zài jiàokēshū zhōng fēicháng chángjiàn. This kind of mathematical notation is very common in textbooks. Source: Dong Chinese Dictionary