Three buttons were missing from his shirt.

他的衬衫少了3颗纽扣。

《柯林斯英汉双解大词典》

In OneView, you have the following three buttons.

在OneView中，有以下三个按钮。

youdao

At the bottom of its window Opera 9.5 displays three buttons.

Opera 9.5的窗口底部有3个按钮。

youdao

So, we approached this machine here, the photograph is a little blurry, but it was very clear to us but if you zoom in on the screen and apologies for the reflections, again, this was just taken with my cell phone, you see what appear to be three huge buttons and at the top it said something like have a Charlie Card, which may very well apply to a lot of locals.

所以，我们走近这个机器，这个照片有点模糊，但对于我们来说是清楚地,如果我把它在屏幕上放大，我对这个影像感到抱歉,但是，这是用我的手机拍的,你们可以看到这里上面有三个很大的按钮,写了一些关于Charlie卡片的东西，对本地人来说是相当熟悉的。

哈佛公开课 - 计算机科学课程节选

The right side of the phone houses three buttons: the volume rocker, power and the dedicated shutter button.

ENGADGET

The next row up in the panel contains three buttons that take you to the advanced menus for WiFi, AudioWizard and system settings.

ENGADGET: ASUS PadFone 2 review: two times is a charm for this phone-in-tablet combo

The difference between direct and indirect manipulation between three buttons and one button, three hundred dollars and fifteen dollars, and a roller ball supported by ball bearings and a free-rolling ball is not trivial.

NEWYORKER: Creation Myth