每天学一个英语单词graduate（每天学点英语单词）

中文翻译：循环 词性：v.

音标：[ˈsɜːrkjəleɪt]

过去分词: circulated 过去式: circulated 现在分词: circulating 第三人称单数: circulates

英文解释：to go around or through something, or to make something go around or through something

circulation [ˌsɜːrkjəˈleɪʃn] n. 循环

blood circulation 血液循环

例句：

Blood circulates through blood vessels.

血液在血管里循环流动。

Good blood circulation is essential to good health.

好的血液混换对健康很重要。