别担心，组装这个书架很简单。
Don't worry, putting this bookshelf together is a piece of cake.
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piece英 /piːs/|美 /pis/
of英 /əv/|美 /əv/|英 /əv/|美 /əv/
cake英 /keɪk/|美 /keɪk/
Don't worry, putting this bookshelf together is a piece of cake.