英语词汇thirty-one是什么意思，thirty-one的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-觉斋网

单词	thirty-one
释义	DEFINITIVE EXAMPLES 权威例句〔black〕There are about thirty-one million blacks in the US.美国大约有3,100万黑人。柯林斯高阶
随便看	safety protection safety provision safety provision safety pulley safety rail safety razor safety razor safety razor safety region safety regulations safety regulations safety regulations safety regulator safety regulator safety relay safety release safety relief valve safety representative safety responsibility act safety reverse lever safety ring safety rod safety roller safety rope safety rules

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