单词	autocollimation
释义	autocollimation noun au·​to·​collimation plural -s : the process of collimating an instrument (such as a telescope) having objective and cross hairs by directing it toward a plane mirror and adjusting the lens and cross hairs so that the latter coincide with their own reflected image Word History Etymology aut- + collimation First Known Use 1870, in the meaning defined above
随便看	going to be sick going to Jerusalem going to one's head going to pieces going to pot going to seed going to the movies going together going toward going towards going train going under going under the knife going up going up in flames going with going without going-away going-over going/getting nowhere fast goings goings-on goings-over goitcho goiter

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