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平均起來...

On average each report requires 1,000 hours to prepare.準(zhǔn)備一份報(bào)告平均需要1,000小時(shí)。Every tonne of coal contains, on average, 30 kilograms of nitrogen.每噸煤平均含30公斤氮.We received 20 calls a day on average.我們平均每天接到二十個(gè)電話....

on average的音標(biāo)：on average的英式發(fā)音音標(biāo)為：[?n '?v?rid?]on average的美式發(fā)音音標(biāo)為：[ɑn '?v?r?d?]...