marker
noun [ C ] uk/ˈmɑː.kər/ us/ˈmɑːr.kɚ/
(SYMBOL)
标识，标志
a sign that shows where something is
I've put in some markers where I planted the seeds. 我在播种的地方放了些标志物。
She reached the 500-metre marker in record time. 她以创纪录的用时到达了500米标志线。
(PEN)
(also marker pen)记号笔
a pen with a thick writing point for writing or drawing