屋脊

qīng zàng gāo yuán yǒu shì jiè wū jǐ de chēng hào

青藏高原有世界屋脊的称号。

The Qinghai-Tibet Plateau is known as the roof of the world.

yòng yú jī guāng qì xuǎn mó de wū jǐ léng jìng

用于激光器选模的屋脊棱镜

a ridge prism for mode-selecting in laser