Foto
abbr. 张紧振子的强制振动（Forced Oscillation of a Tightening Oscillator）
🗣️ 情景例句
Well,
是的，
Do they have children?
他们有孩子吗？
Before very long the parents will be complaining that the child is so secretive and never tells them anything,
不要很久，家长就会抱怨孩子守口如瓶，什么事也不告诉他们，