biāo​zhù

annotate

标注 (標注) biāo​zhù
annotate verb
to tag or add metadata to text or data, such as pinyin, linguistic labels, or data categories

All the new words in this text are annotated with Pinyin.

mark verb
to mark out or put a sign on something for identification or to call attention to it

The researcher marked several key data points on the complex chart.

Frequency

Movie subtitles
1.40 per million appears in 1% of films
Written text
6.21 per million

Sources

Definitions
CC-CEDICT