空气污染会改变精子——第2级
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汽车和工厂排放的哪两种污染物被认为会对精子DNA造成最大危害,从而导致精子数量减少和精子活力下降?
LEARN 3000 WORDS with CHINESE IN LEVELS
Chinese in Levels is designed to teach you 3000 words in Chinese. Please follow the instructions
below.
How to improve your Chinese with Chinese in Levels:
Reading
- Read two news articles every day.
- Read the news articles from the day before and check if you remember all new words.
Listening
- Listen to the news from today and read the text at the same time.
- Listen to the news from today without reading the text.
Writing
- Answer the question under today’s news and write the answer in the comments.

