interval

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【词性】：n．

【释义】：

间隔，间歇

at intervals阵发性地

at irregular intervals不定期地

at regular intervals每隔一定时间

intervals between coughing spells阵咳

intervals of sanity神志正常的间歇

vomit at intervals阵发性呕吐

The interval between every two courses is(should be)5 days．各疗程需间隔五天。