| 释义 | 
             
                chlorine required
                
            氯气lǜ qì 
 chlorine必修课bì xiū kè 
 a required course; required course; compulsory course必选bì xuǎn 
 required; mandatory必修课程bì xiū kè chéng 
 required course临机lín jī 
 as the occasion requires在必要时zài bì yào shí 
 as occasion requires叩头如仪kòu tóu rú yí 
 kowtow as custom required; knock one's head on the floor as ceremony氯lǜ 
 chlorine; chlorin; chlorinum应运而生yīng yùn ér shēng 
 emerge as the times require要求报酬率yào qiú bào chóu lǜ 
 hurdle rate; required rate of return氯化氢lǜ huà qīng 
 hydrogen chloride; chlorine hydride需xū 
 need; want; require; necessaries; needs躬自厚而薄责于人gōng zì hòu ér báo zé yú rén 
 require much from oneself and little from others需要xū yào 
 need; want; require; demand; do with要求yào qiú 
 ask for; require; demand; claim; request更改处应加盖印章gèng gǎi chù yīng jiā gài yìn zhāng 
 alterations require initials
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