It comprises of four parts, namely: flow limitation hole, focus ring, electrode ring and nozzle.

它包括四个部分：限流孔、聚焦环、电极环以及喷嘴。

youdao

Now he could focus his attention on examining the strange ring.

现在他可以集中注意研究这枚戒指了。

youdao

As his personal life spiraled out of control, Tyson lost his focus in the ring.

由于私人生活严重失控，泰森无法再专注于拳击场上。

youdao

It is possible to use the focus ring for focusing just like an SLR camera.

ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens

Like the HC1, the HC3 records up to 1080i onto standard mini-DV cassettes in HDV format, but it ups the ante with stills up to four megapixels (and even simultaneous widescreen 2.3 and 4:3 1.7 megapixel stills while shooting video), although it has a lower gross pixel count, no manual focus ring, and we've heard grumblings of a "noisier" picture.

ENGADGET: Sony HDR-HC3 cam is real, promises to bring HD recording "mainstream"

When the Fn 2 lever next to the lens is placed downward, the ring around the lens switches to analog control so it can be used as a focus or a zoom ring.

ENGADGET: Olympus Stylus XZ-2 is a digital compact stuck in a mirrorless camera's body, we go hands-on