It means: You didn’t see the tall pine trees still in the deep ravines in the mountains.
Original sentence: Don’t you see the long pine lying in the ravine trapped in the wind and frost, but it will stand upright in the Fuming Hall.
Translation: Haven’t you seen the tall pine trees? They are still in the deep ravines in the mountains. When no one knows about them, they are only surrounded by wind and frost and cannot see the sun; but once luck comes, When the time comes, it will be recruited by the imperial court and put to great use, and can support the emperor's palace and mansion.
Source: "Reading" by Lu You of the Song Dynasty
Lu You's literary achievements
Lu You has many literary talents, especially his achievements in poetry. He said that "Ten Thousand Poems in Sixty Years", there are more than 9,300 poems in existence, which can be roughly divided into three periods: before entering Shu at the age of 46, he preferred written forms; from the time he entered Shu until he resigned from office and returned eastward at the age of 64, his poetry creation The mature period is also a period of great change in the style of poetry, from specializing in "algae painting" in the early years to pursuing a grand and unrestrained style, full of fighting spirit and patriotic passion; in his later years, after living in seclusion in his hometown of Shanyin, the style of poetry tends to be simple and solid, It shows a clear and distant pastoral flavor, and sometimes reveals the desolate emotion of life.