unexpressive

adj.

缺乏表情的，无表现力的，无意义的；

Listener Perception of Expressivity in Collaborative Performances Containing Expressive and Unexpressive Playing by the Pianist.
The "Unexpressive She": Is There Really a Rosalind?
Legal Drafting: Curing Unexpressive Language
Legal Drating: Curing Unexpressive Language
Giving Voice to the Unexpressive Patient
ON THE LARGEST UNEXPRESSIVE INTEGER OF THE LINEAR FORM sum from i=1 to 3 (a_ix_i)
"UNEXPRESSIVE NOTES": THE DECORUM OF MILTON'S NATIVITY ODE
A REINTERPRETATION OF “THE UNEXPRESSIVE NUPTIAL SONG”
A REINTERPRETATION OF “THE UNEXPRESSIVE NUPTIAL SONG”
Effects of Conductor Expressivity on Secondary School Band Members' Performance and Attitudes toward Conducting.