科學史
Simplified: 科学史
Sign up for a free account to save words and hear them read aloud
Study without daily limits with Pro
Character by character
Chinese Boost Pro
Save as many words and example sentences as you like. Use Review and start new Exercises without daily limits. Your first subscription includes a 7-day free trial.
Sign up for a free Chinese Boost account
Save the words and sentences you find here to your own list, and hear them read aloud. You can export the list to your flashcards whenever you like.