Foto
abbr. 张紧振子的强制振动（Forced Oscillation of a Tightening Oscillator）
🗣️ 情景例句
Right.
好的。
The plans are not even made yet.
这计划还不曾有人策划过。
Two years later, her father disappeared, never to be heard from again.
两年后，她父亲失踪了，从此再无音讯。