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1. The engineer designed a new type of extending tower to support the heavy equipment.
工程师设计了一种新型的延伸塔来支撑重型设备。
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2. The company has built several extensions on its main building to accommodate more employees.
该公司在其主楼旁边建造了几个扩展，以容纳更多的员工。
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3. The scientist used an extending tower to conduct experiments in a high-altitude laboratory.
科学家使用延伸塔在高空实验室进行实验。