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.
详情正文
登录后查看完整内容
使用 DeepEvidence / 梅斯账号登录，新用户可在登录页面注册。
登录 / 注册登录成功后将返回当前页面，继续浏览。