The meaning of "if hidden and if present" is: as if disappearing, and as if appearing. It describes something that seems to be there or not there, not real or clear.
Pinyin: ruò yǐn ruò xiàn?
Origin: Qing Pu Songling, "Liaozhai Zhiyi - Zhu'er": "Li was shocked, and when he was about to cross-examine him, he saw that he was as if hidden and as if he were in a trance, like smoke, and had already climbed onto the couch in the middle of his turn."
Example: The sky was overcast, and the sun was hidden behind the clouds.
Near synonyms
If there is nothing [ ruò yǒu ruò wú ]?
Definition: describes things that are not clear or close.
Origin: Ming Hong Yingming (明-洪应明)《菜根谭-闲适》："若若若无，半真半幻，最足以悦人心目而豁人性灵。 It is a wonderful place between heaven and earth."
Example: The wind, gently blowing up the white long skirt, hovered around the feet, scraping up the cherry blossoms on both sides of the river, fluttering in the sky. Early in the morning above the river surrounded by misty smoke, depicting the woman's appearance as if it were a fairy who does not eat earthly fire descending to the earth, swimming on the fairy-like bridge.