Sinking below the bird and mast, a drowned corpse glanced through the green water; a fair arm was the only limb clearly visible, whence the bracelet had been washed or torn.

在鸟和桅杆下面的碧波里，隐约可见一具沉溺的尸体，它身上唯一看得清清楚楚的肢体是一只美丽的胳膊，那手镯就是从这里被水冲走或是给鸟儿啄下来的。

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The pipe racks are moved to and from their stored position by a hydraulic cylinder attached between the mast frame and the lower swing arm.

管架是通过一个装在支架框和下摇动臂之间的液压缸往返于其贮存位置的。

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Besides the high mast, it has an "arm" that can go even higher and carries another camera.

CNN: Curiosity opening Martian frontier?

It is using its mast-mounted colour cameras and laser spectrometer, together with its arm-held "hand lens" camera and X-ray spectrometer, to try to find the best drill candidate.

BBC: Curiosity Mars rover deploys its rock brush