trass
/tras/US // træs //UK // (træs) //
鳟鱼,鳟鱼的种类
Definitions
n.名词 noun
- 1
- : a light-colored type of volcanic tuff used in making water-resistant cement and mortar.
Examples
Sometimes a proportion of common sand mortar instead of lime is mixed with the trass.
Trass, tras, n. a volcanic earth used as a hydraulic cement.
After it has been quarried it is ground in mills, and used for cement stone under the name of trass.
He wished that the Trass boy would talk forever about destiny.
The Dutch are very attentive in ascertaining the quality of the trass before using it in building their dikes.
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