The poem about concrete is 1. Idioms describing specific things
solid
Guruodantang
Explain the city made of metal and the moat made of boiling water. Describe the fortifications as extremely strong.
The source "Hanshu Kuai Tong Biography": "The baby city must be strong, and it is a golden city and Tang Chi. It cannot be attacked."
The structure is formal.
The usage is awesome Used for military defense. Generally, it can be used as predicate, attribute and complement.
Distinguish whether; Can't write "bitter"
Synonymous with iron wall, rock-solid
Antonyms are easily broken and fragile.
Discrimination and "rock-solid" can both describe "the stability of things" but ~ only applies to things; Most of them describe the firmness of passing, standing and defense line related to defense; Unbreakable; "Rock-solid" is often used to describe the firmness of buildings; It is also a metaphor for the power of groups, organizations and countries.
example sentence
(1) Under the rapid offensive of the German army; This line of defense claimed by the French army ~; Suddenly collapsed.
(2) Chang 'an is well defended; ~。
2. Idioms that describe specific things
Rock-solid jiān rú pán shí interpretation firm: firm, firm; Stone: A big stone.
As strong as a big stone. This metaphor is unshakable.
From Gulefu's Peacock Flying Southeast: "The rock is thick and can die for thousands of years." "Selected Works and Nineteen Ancient Poems": "If there is no solid stone, how can there be a false name?" The structure is formal.
Usage is often used in abstract things such as unity, will, friendship and belief; Sometimes it also refers to specific things. Generally used as predicate and attribute.
Pronunciation rock; It can't be pronounced "pān". Shape-distinguishing pot; Can't write "disk"
Discrimination between synonyms as safe as Mount Tai and antonyms as safe as rock (1) and "as safe as rock"; They all mean "unshakable as a rock", which is sometimes universal.
But ~ emphasize "firmness"; "Rock-solid" emphasizes "slow and steady". (2) ~ is similar to "as safe as Mount Tai"; Both describe the firmness and stability of things; And can describe the firmness of the building; Invisible.
But ~ focus on "firmness"; It can also be used to describe the strength of a country, a group, an organization or an ideology and belief; As Steady as Mount Tai focuses on "security" and "stability"; It can describe people's leisurely attitude at critical moments. (3) ~ and "impregnable"; They all describe "unbreakable things."
But ~ is often used to describe the firmness of buildings. It is also a metaphor for the power of groups, organizations and countries; "Solid as gold" is only used for things; Most of them describe the city array related to "defense".