"blank or missing portion in a manuscript," 1660s, from Latin lacuna "hole, pit," diminutive of lacus "pond, lake" (see lake (n.1)). The Latin plural is lacunae. Related: Lacunal; lacunar; lacunose.
例文
1. Reasons of forming first cracks were foundry lacuna ,impurity gathering,lard exiting.
鋳造欠陥、不純物元素の偏重合及び介在物の存在が初期亀裂源を形成する原因である.
2.Results 42 cases were successfully,detain 7-16 days without lacuna out.
結果42例のチューブセットはすべて成功し、留置時間は7-16日、チューブ抜けはなかった。
3.There was so much very deep lacuna in his crude big hands.
ざらざらした大きな手の上の深い裂け目。
4.It is this political lacuna that makes optimists about Brazil so impatient.