双万向节 Double universal joint
双万向联轴节 constant-velocity universal joint ; double universal coupler ; Double Universal Joint
双万向节传动轴 Double jointed propeller shaft
双联式万向节 dual Cardan type U-joint ; double cardan joint
双万向联轴器 [车辆] double universal coupling ; [车辆] double universal joint
双辊万能压光机 combination hydraulic calender
万能双面打印法 Easy Double-sided printing
双万向节座 double universal socket
通过使用专门的蒸汽方法和压力机，他已经回收了3200万双筷子。
Using his special methods of steam and press machines, he has recycled 32 million pairs of chopsticks.
2016年，加拿大的英属哥伦比亚大学的博士生菲利克斯·博克发现，仅在温哥华，人们每天就会扔掉大约10万双筷子。
In 2016, Felix Bock, a doctoral student at the University of British Columbia, Canada, found out people threw away about 100,000 pairs of chopsticks every day in Vancouver alone.
这会每天增加40万双筷子的产量。
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