黑盒
hēi hé
Definitions
- 1. black box
- 2. fig. system whose internal structure is unknown
Stop forgetting what you study.
Build recall daily.
Try HanyuGuide's Chinese review system with multiple choice, typed recall, tone-aware practice, and reviews scheduled before memory fades.
Start Free Trial · $49.99 / year
Did Google show an error? Sorry about that. Use your email below instead.
Lifetime for $119.99
Try a practice session