他看了一眼她戴的帽子，突然大笑起来。
He took one look at the hat she was wearing and burst out laughing.
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burst英 /bɜːst/|美 /bərst/
解释
burst 是动词，意思是"突然爆发、突然发生"。
out 是副词，表示"向外、完全地"。
burst out laughing 是一个固定短语，意思是"突然大笑起来"，形容笑声突然爆发出来。
He took one look at the hat she was wearing and burst out laughing.
burst 是动词，意思是"突然爆发、突然发生"。 out 是副词，表示"向外、完全地"。 burst out laughing 是一个固定短语，意思是"突然大笑起来"，形容笑声突然爆发出来。