单词	understratum
释义	un·der·stra·tum (ŭndər-strā′təm, -străt′əm) n. pl. un·der·stra·ta (-strā′tə, -străt′ə) or un·der·stra·tums A substratum.
随便看	trickily trickiness trickish trickishly trickishness trickle trickle charge trickle-down trickle-up trick or treat trick-or-treat trick out trick out (or up) trickster tricksy trick up tricky triclinic triclinium tricolor tricorn tricorne tricornered tricostate tricot

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