Foto
abbr. 张紧振子的强制振动（Forced Oscillation of a Tightening Oscillator）
🗣️ 情景例句
I really mean it.
当然是真的。
She is a member of the ski club.
她是滑雪俱乐部的成员。
This experience was to change his life.
这一经历后来改变了他的生活。