问题描述：
英语
i think i will fall ,thus i lean against on the desk in order to hold up myself.
lean against the desk 不就ok了吗,为什么还有个on?
i think i will fall ,thus i lean against on the desk in order to hold up myself.
lean against the desk 不就ok了吗,为什么还有个on?
问题解答：
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