Then move Rayman with the circular button.

然后用方向键移动雷曼。

youdao

Use your swords to fight the enemies:press on 4 to attack(Sword)and on 7 to carry out a super attack (Fire Sword) and advance using the circular button.

用你的剑攻击敌人：按键4攻击（剑），按键7实现超级攻击（火箭），并使用环绕方向键控制。

youdao

We can produce all kind of button like circular button, corn, bump nail, metal pearl, button bottom with the material of iron, copper, stainless steel, alloy.

能生产各种不锈钢、铜、铁、合金等材料的圆形扣、鸡眼、撞钉．钮底、平珠和钮扣配套的辅料产品。

youdao

You could use your thumbnail to use the circular Select button, but then you may scratch the keys, which I've read can happen.

ENGADGET: Hands-on with Motorola's RAZR V3 for Cingular

This may be conceptually sensible, but this button has a circular arrow symbol reminiscent of the "Back" button on a Web browser.

ENGADGET: Switched On: Jane, Stop This Crazy Thing

Once you've lined up the shot you want, a tap on the circular on-screen button will fire the camera.

ENGADGET: Nikon WU-1a wireless mobile adapter for D3200 review: using Android as a remote trigger / wireless display