W: We went to an oyster bar, and then we went to eat Chinese food. After that, we had Italian gelato, espresso, and...
W：我们昨天去吃了牡蛎，中国菜，之后吃了意大利冰淇淋、咖啡、还有…
W is attached to a bar, movable vertically around an axis a and suspended by the helical spring F.
摆锤W装在一根杆上，在轴a周围垂直移动，它由螺旋弹簧f所悬挂。
W is attached to a bar, movable vertically around an axis a and suspended by the helical spring F.
摆锤W装在一根杆上，在轴a周围垂直移动，它由螺旋弹簧f所悬挂。
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