They used special equipment to send out laser pulses into the web of a garden cross spider. Then they used a laser to measure the very small vibrations, which spread through the web.
他们利用特殊设备向一只十字园蛛的蛛网上发出激光脉冲，然后他们利用激光测量这种传遍蛛网的微小振动。
The U-shaped pieces are called yokes. The cross that connects them is called a spider. The arms that extend from the spider are called trunnions.
u形件称为万向节叉，连接万向节叉的十字叉叫作十字轴，从十字轴延伸出的臂叫作耳轴。
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