Playgrounds
n. 操场( playground的复数形式 ); 游乐场; 娱乐场; （某些集体聚会游乐的）园地
🗣️ 情景例句
Bye.
再见。
To cast off the shell
蜕皮
Because the equipment for adding sound to films had not yet been developed.
因为给电影配音的设备还没有研制出来。