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I can start it off at a certain position which I can choose.
我可以在某一个位置，释放它，位置我可以选择。
youdao
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Nice to let objects appear or disappear at a certain position in space.
让物体在空间的某个位置显示或隐藏也很好。
youdao
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Nice to let objects appear or disappear at a certain position in space.
让物体在空间的某个位置显示或隐藏也很好。
youdao