Foto
abbr. 张紧振子的强制振动（Forced Oscillation of a Tightening Oscillator）
🗣️ 情景例句
The woods are lovely, dark and deep,
林子迷人 漆黑而深邃
A discount of six percent is all that I'm authorized to offer you.
6%的折扣是我权限内所能给你的。
Hello, Jim! Help yourself to a cake.
你好，吉姆！请随便吃糕点。