例句
The weather became warmer.
天气变暖和了。
Slowly my eyes became accustomed to the darkness.
我的眼睛渐渐适应了黑暗。
Helen became increasingly anxious about her husband’s strange behaviour.
海伦越来越担心她丈夫的反常行为。
Pollution from cars has become a major problem.
汽车污染已成为严重的问题。