自己动手制作一个隐藏 Gone to Ground
儿童可以自己动手制作一个好玩的空间。
收不回来计数,自己动手制作了一项法案收集。
Counting on being paid back is making yourself a bill collector.
自己动手制作一套联络信号装置,既可解决前后呼应问题,又利于文明操作。
To do a set of connection signal apparatus by self can solve the question echoing each other in front and behind, and benefit civilized operation.
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