坦丁堡的血泪
英语day by day是副词，副词可以作状语；句首加逗号，句末没有其他成分不加，有其他成分加；eg.I live for the moment, day by day, not for the past；day by day,I live for the moment, not for the past.
玛雅家具
day by day一天天；逐日(常表示逐渐转变)词性：adv.英文解释：gradually and progressively同义词： daily例句：Perhaps for two reasons: first, God wants us to lean on him day by day; and second, he knows we can’t handle looking forward to a whole lifetime all in onechunk.
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