lacuna

n.

空白；空隙；腔隙；缺陷

复数：lacunae

1. Fill up a lacuna in one's knowledge
   填补知识上的空白。
2. His long reticence temporarily distracted attention from a bigger lacuna.
   他始终保持沉默，分散了人们对一个更大缺漏的注意力。
3. There was so much very deep lacuna in his crude big hands.
   粗糙的大手上一道道很深的裂口。

Osteocyte lacuna size and shape in women with and without osteoporotic fracture.
Hempel's Raven Paradox: A Lacuna in the Standard Bayesian Solution
Microdamage and osteocyte-lacuna strain in bone: a microstructural finite element analysis.
Filling the lacuna between research and practice: an interview with Michael Peckham. Interview by Richard Smith.
Inducible phenotypic plasticity of the radula in Lacuna (Gastropoda: Littorinidae). Veliger 4:201-204
Embolisms and refilling in the maize leaf lamina, and the role of the protoxylem lacuna
Algal associations of Tricolia pullus, Lacuna vincta and Cerithiopsis tubercularis (Gastropoda) with special reference to the settle...
Virtual restoration of ancient Chinese paintings using color contrast enhancement and lacuna texture synthesis
Virtual restoration of ancient Chinese paintings using color contrast enhancement and lacuna texture synthesis
Effects of body size, water current and microhabitat on mucous-thread drifting in post-metamorphic gastropods Lacuna spp.