“ex-focal”的英英意思

单词 ex-focal
释义 ex-focal, a. rare—1.|ɛksˈfəʊkəl|
[f. ex- prefix1 + focal.]
Not passing through the focus.
1881T. Stevenson in Nature XXIII. 560 The ex-focal rays proceeding from the outer edges of the flame.

 

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