为密切的家庭，即使电子产品，如照相机或电视可被视为适当的。
For close family, even electronic goods such as a camera or television might be seen as appropriate.
城里有很多工厂，它们制造各种产品，如照相机、无线电、计算机和电视机。
There are many factories in the city. They make many different things, such as cameras, radios, computers and TV-sets.
光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量。
A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.
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