Every turn of this rotating frame box will bring fond memories... and smiles.
旋转像框盒，每一个的转动都会给您带来甜美的回忆，让您会心一笑。
The proposed system is constructed in a synchronously rotating reference frame and is very simple.
该系统建立在同步旋转坐标系下，数学模型较为简单。
The proposed system is constructed in a synchronously rotating reference frame and is very simple.
该系统建立在同步旋转坐标系下，数学模型较为简单。
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