checkered past造句怎么写

2、A family with a checkered past.

4、Ketamine eis not approved for depression, and it has a checkered past in psychiatric research.

6、A former hockey star turned hitman returns home after ten years to take care of his younger brother, but his checkered past catches up to him faster than he can deliver pizza.

3、BMW also has a checkered past with alternative fuels.

1、She'd had a checkered past.

5、Ketamine is not approved for depression, and it has a checkered past in psychiatric research.