Ditactic
短臂交叉的, 构型的双中心规整性
🗣️ 情景例句
What's the nature of the problem?
是什么样的问题？
Rear sons for help in old age; and store up grains against famine.
养儿防老。
Later, the Crystal Palace was moved to South London.
后来，“水晶宫”被移到了伦敦南部。