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Kerosene is a by - product of petroleum refining.是什么意思？

Kerosene is a by - product of petroleum refining.

煤油是提炼石油的 副产品.

相关词汇
kerosene is by product of petroleum refining

kerosene

n. 煤油，火油，灯油，洋油；

is

vt.& vi. 是（be的三单形式；n. 存在；

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

product

n. 产品，结果，乘积，作品；

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

petroleum

n. 石油；

refining

n. 精
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