平顺

hū xī píng shùn

呼吸平顺

breath normally

shēng huó píng shùn

生活平顺

live a common and orderly life

fā zhǎn píng shùn

发展平顺

smooth development

lún tāi cǎi yòng quán xīn de cái liào bǎo zhèng píng shùn xìng

轮胎采用全新的材料保证平顺性。

The tires are made of brand-new materials to ensure smoothness.