这些旧书是出售的吗？
Are these old books for sale?
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for英 /fɔː/|美 /fɔr/
sale英 /seɪl/|美 /seɪl/
Are these old books for sale?
Are these old books for sale?
Are these old books for sale?
在 App 中完整学习这张卡片
在 App 中学习