concave preset lens前置: prepose; preposition; pre-凹面鏡: concave mirror凹面鏡: concave lens; concave mirror; concavemirror凹鏡，凹面鏡: concave mirror球面凹面鏡: spherical concave and convex mirrors下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
