Circulatory is the body-science word for things that have to do with blood moving around you. Your heart pushes blood out; vessels carry it to the rest of you and back again. That whole loop is the circulatory system.

Circulatory is the body-science word for things that have to do with blood moving around you這個字是人體科學用來指「跟血液在體內流動有關」的字。 Your heart pushes blood out心臟把血液推出去， vessels carry it to the rest of you and back again血管把血液送到身體各處再送回來。 That whole loop整個這個循環 is the circulatory system就是循環系統。

A circulatory problem is a problem in that loop — the heart, the arteries, the veins, the way blood flows.

A circulatory problem循環系統的問題 is a problem in that loop就是這個循環出了問題—— the heart, the arteries, the veins, the way blood flows心臟、動脈、靜脈，或血液流動的方式。

The word is medical and fairly formal. In class and at the doctor you will hear it; in ordinary talk people say blood circulation or heart and blood vessels.

The word is medical and fairly formal這個字偏醫學、相當正式。 In class and at the doctor you will hear it在課堂上和看醫生時會聽到這個字， in ordinary talk people say blood circulation or heart and blood vessels平常講話大家會說blood circulation（血液循環）或heart and blood vessels（心臟和血管）。

It does not mean “circular” as in a round shape, and it is not about gossip circulating, even though circulate can mean “go round among people.” Here the going-round is inside the body, and the thing going round is blood.

It does not mean “circular” as in a round shape這個字不是指「圓形」的circular， and it is not about gossip circulating也跟八卦流傳（circulating）無關， even though circulate can mean “go round among people.”雖然circulate這個動詞可以指「在人之間流傳」。 Here the going-round is inside the body這裡的「流動」是在身體裡面， and the thing going round is blood流動的東西是血液。