单词：keen demand
keen demand的用法和样例：
例句
- Soon there was a large demand for kerosene.不久就产生了对煤油的大量需求。
- The demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line.对检测的大量需求催生了那些非常规的实验室，在这些实验室中成箱的标本瓶接受流水线一般的处理。
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