重点讲解：
1. hold up 举起；抬起；提起；
Hold it up so that we can see it.
把它举起来让我们看看6UDFf-F4vz。
2. figure out 想出；理解；弄清；
It took them about one month to figure out how to start the equipment.
他们花了大约1个月的时间才搞清楚如何启动设备f4v_iUyFfZAO#U。
3. prevent sb. from sth./doing sth. 阻止；制止；阻碍；
He said this would prevent companies from creating new jobs.
他说这将使公司无法创造新的工作机会qTkoZq,i&ddrhI~。
4. be made of （由…）构成的；（由…）制成的；
The top of the table is made of glass.
桌面由玻璃制成X%,Q4S5J(#1DNV1+。