This is the 4621st most frequent Chinese word.
混凝土
Concrete.
In this sentence, '混凝土' emphasizes its properties as a building material, discussing its characteristics.
这种混凝土具有较高的耐久性和抗压强度。
This type of concrete has high durability and compressive strength.
'混凝土' here is referred to in the context of its application in construction, stressing the importance of quality.
为了制作坚固的建筑结构，必须选用优质的混凝土。
To create sturdy architectural structures, high-quality concrete must be chosen.
Here, '混凝土' is used to refer to the material 'concrete' as used in construction.