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If something springs up, it suddenly appears or begins to exist.
如果某物spring up,那么就是说这个东西突然出现,或涌现
What caused this doubt to spring up in your mind?
什么原因使你突然产生了这个疑团?
Many monster high-rise buildings spring up all over the city.
许多巨大的高层建筑在这座城市拔地而起。
After the rainy season, the new green grasses spring up.
雨季以后,绿茵茵的新草勃然生长。