The second half of the sentence "The sun is like an arrow, the sun and the moon are like a shuttle". The correct way to say it is "Time is like an arrow, the sun and the moon are like a shuttle", which is an eight-character idiom.
Explanation:
Shuttle: The component on the loom that guides the interweaving of weft and warp yarns. Describing time passing very quickly
Source: "Kyomoto Popular Novels: Grinding the Jade Guanyin": "Time flies like an arrow, the sun and the moon fly by, and it lasts more than a year."
Grammar : Time flies like an arrow, and the sun and the moon fly like a shuttle. It can be used as an object, attributive, or clause. It can be used separately.
Example: Chapter 24 of "The Heroes of Sons and Daughters" by Wenkang of the Qing Dynasty: "Time flies like an arrow, and the sun and the moon fly by. I am just waiting to eat rice dumplings and moon cakes."
Synonyms : Time flies, the sun and the moon fly by like a shuttle
Synonyms:
Explanation: Time flies: passing by unconsciously; shuttle: a component on the loom that guides the interweaving of weft and warp yarns. Describing time passing quickly
Source: Chapter 71 of "Three Heroes and Five Righteousness" by Shi Yukun of the Qing Dynasty: "Time flies, the sun and the moon fly by, and in the blink of an eye, Ni Jizu is already sixteen years old."
Grammar: Time flies, the sun and the moon fly by as objects, attributives, and clauses, which can be used separately.
Synonyms: Time flies, the sun and the moon are flowing