This is a popular expression that is worth the time to learn.
这是一个值得花时间去学习的流行表达。
About one hundred years ago, greenhorn was a popular expression in the American west.
大约一百年前，greenhorn在美国西部是一个常用的表达。
About one hundred years ago, greenhorn was a popular expression in the American west.
大约一百年前，greenhorn在美国西部是一个常用的表达。
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