activities of decorum and customs的用法和样例：
- In the presence of elderly visitors our son was a model of decorum.
- One who is accustomed to depravity, on the contrary, always softens things, acts more disgustingly, but with a show of decorum and seemliness by which she claims to be superior to you.
- The study of such lore and customs.
- Serum GPDA activities of healthy persons and ca...