humming top

n.

发响声的陀螺；

Humming top
Humming top
Humming top
Synthesis of hierarchical rose bridal bouquet- and humming-top-like TiO 2 nanostructures and their shape-dependent degradation effi...
THE HUMMING-TOP
THE HUMMING-TOP
THE HUMMING-TOP
Isomerization of a lanthanide complex using a humming top guest template: a solid-to-solid reaction
The Humming Top
The Globe and the Humming Top
The Humming Top, Or, Debit and Credit in the Next World
[The Humming Top]
Top-fill hummingbird feeder