Meaning of ruì:
瑞
lucky; auspicious; propitious
Dàjiā dōu shuō zhè shì yīgè jíruì de rìzi.
大家都说这是一个吉瑞的日子。
Everyone says that this is a lucky day.
Chūnjié shì gè rènào de jiérì, rénmen yòng hóngsè lái xiàngzhēng ruìxiáng.
春节是个热闹的节日,人们用红色来象征瑞祥。
The Spring Festival is a lively holiday where people use the color red to symbolize auspiciousness.
Xīn nián kuàilè! Xīwàng xīn de yī nián chōngmǎn jí ruì de shìjiàn.
新年快乐!希望新的一年充满吉瑞的事件。
Happy New Year! I hope the new year is filled with propitious events.
rayl (acoustical unit)
Zhège shíyàn shì zhèngzài yánjiū shēngyīn de ruì dānwèi.
这个实验室正在研究声音的瑞单位。
The laboratory is studying the acoustical unit rayl.