- 打底子 dǎdǐzi to lay a foundationTo lay a foundation; to provide a basis for future development or learning
- 打底稿 dǎdǐgǎo to prepare a draftTo write an initial draft or prepare a sketch; figuratively, to set a base or standard.
- 打底裤 dǎdǐkù leggingsTight-fitting pants similar to tights, often worn under other clothing for style, to shape the figure, or for modesty