the hard woody covering around the kernel of a nut 坚果壳
(nut shell)any of a number of bivalve molluscs occurring chiefly in cool seas, in particular (生存于冷海水中的)双壳类软体动物,尤指
a small oval-shelled bivalve (genus Nuculana, family Nuculanidae) a bivalve with a rectangular shell which is rounded at the front and angled behind (genus Nucula, family Nuculidae) 小椭圆形双壳类软体动物(吻状蛤属,吻状蛤科) (前圆后尖的)矩形双壳类软体动物(胡桃蛤属,胡桃蛤科)
常用词组 in a nutshell
in the fewest possible words 简单地(说),概括地(说) she put the matter in a nutshell. 她简单地介绍了一下事情的经过。