urchin

1. You should sheer off the urchin.
   你应该躲避这顽童。
2. Her hands were small and brown, an urchin's hands.
   她那双手很小，有点淡褐色，简直就是一双顽童的手。
3. An urchin who had frequently seen him before, stopped to gaze.
   一个以前常在那里看见他的顽童，停下来观望着。
4. The photo shows the scene of harvesting sea urchin.
   图为海胆收获的场景。

The movement of sea-urchin spermatozoaThe Propulsion of Sea-Urchin SpermatozoaThe Propulation of Sea-Urchin SpermatozoaActivation of sea-urchin eggs by calcium ionophorePatterns of Fish and Urchin Grazing on Caribbean Coral Reefs: Are Previous Results Typical?Self-Assembled 3D Urchin-Like NaY(MoO4)2:Eu3+/Tb3+ Microarchitectures: Hydrothermal Synthesis and Tunable Emission ColorsInteractions of sea-urchin skeleton macromolecules with growing calcite crystals|[mdash]|a study of intracrystalline proteinsTemplate-free synthesis and characterization of novel 3D urchin-like 伪-Fe2O3 superstructuresThe Effect of Partial Extraction of Dynein Arms on the Movement of Reactivated Sea-Urchin SpermAdenosine triphosphate-induced sliding of tubules in trypsin-treated flagella of sea-urchin sperm.