介绍:
skull 脑壳，头盖骨
What the skull encloses is the brain. Therefore, if you say so-and-so has an empty skull，you mean he is a person who has little knowledge . Then，is it good to have a thick skull？By no means. To have a thick skull means “to be very stupid”.
You must have seen signs of a skull with two thigh bones crossed below it. Handle boxes or bottles with such a sign on them with great care. The sign tells you that they contain something poisonous.
脑壳之内装的就是脑子，因此如果你说某人have an empty skull（头脑空空），就表示这个人知识浅薄。那么具有a thick skull，是不是好呢？一点儿也不好。to have a thick skull是笨头笨脑的意思。
骷髅头下两根大腿骨交叉的图像你该见过吧？搬动带有这种图像的箱子或瓶子，可得十分小心，这个图形告诉你，那里面有某种毒物，危险⚠️
