Zhè tái xiǎnwēijìng lǐ yòng le yī piàn wānyuèxíngtòujìng.
This microscope uses a meniscus lens inside.
Tips
memory
弯月形 = 'crescent-moon-shaped'; 透镜 = 'transparent mirror' = lens. Together: a lens shaped like a crescent moon. The English 'meniscus' is the Greek word for the same shape (little moon).