Foto
abbr. 张紧振子的强制振动（Forced Oscillation of a Tightening Oscillator）
🗣️ 情景例句
We haven't had any complaint of this kind. Is there any evidence.
我们还从未听过这样的抱怨。有什么证据呢？
Oh, no! Not today, please!
哦，不要！今天就饶了我吧。
while our own compulsory school attendance became law in Germany in 1642,
而我们的义务教育成为法律在德国是在1642年，