He learnt very fast and became very interested in science.
他学得很快，对自然科学产生了浓厚的兴趣。
My baby is progressing very fast. In the morning, he couldn't sit stablly by himself, while in the afternoon, he suddenly learnt to sit on his own.
宝宝的进步真是惊人的快啊，上午还坐不稳要人时不时扶一下的小魔头，下午就突然会坐坐了。
My baby is progressing very fast. In the morning, he couldn't sit stablly by himself, while in the afternoon, he suddenly learnt to sit on his own.
宝宝的进步真是惊人的快啊，上午还坐不稳要人时不时扶一下的小魔头，下午就突然会坐坐了。
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