Meaning of zhī jiān:
zhī jiān
之间
Preposition
(after a noun) between; among; amid
Péngyǒu zhījiān yīnggāi hùxiāng bāngzhù.
朋友之间应该互相帮助。
Friends should help each other.
Measure Word
(used after certain bisyllabic words to form expressions indicating a short period of time, e.g. 彈指之間|弹指之间[tan2 zhi3 zhi1 jian1])
Liǎng kē shù zhījiān yǒu yī tiáo xiǎo lù.
两棵树之间有一条小路。
There is a small path between the two trees.