热热热久久久免费视频|第四色五月婷婷五月天AV|日韩高清无码免费一级大片|日本成人手机在线视频|中文字幕无码Av在线|台湾a级别黄片免费看|欧美一级性爱亚洲第一性爱|A级黄色电影久草大|www.91精品视频|亚洲AV资源欧洲无码在线观

單詞乎

unaided eye

unaided eye是什么意思、unaided eye怎么讀

unaided eye漢語翻譯

肉眼

unaided eye例句

  1. An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.
    顯微鏡用一個透鏡或一些透鏡的組合來制造小物體的放大形像的視力工具,通常用來觀察肉眼看不到的物體
0
糾錯