The short, thick first finger of the hand, opposable to others.

• The digit used for gripping opposite the fingers.

手上短而粗的第一指，可与其他手指对掌。

• 与其他手指相对用于抓握的手指。

The movable knob on a slider or scrollbar.

• The part dragged to adjust a value or position.

滑块或滚动条上可移动的拖动块。

• 用于拖动以调整数值或位置的部分。

A very small image used as a preview.

用作预览的很小的图像。

To press, touch, or manipulate with the thumb.

• To soil or wear by frequent handling.

用拇指按、触或操作。

• 因频繁拿捏而弄脏或磨损。

To turn pages quickly in order to skim.

快速翻页以浏览。

To seek a ride by signaling with an outstretched thumb.

伸出拇指示意搭车。

To cock or operate a firearm’s hammer with the thumb.

• To fire rapidly by repeatedly thumbing the hammer.

用拇指扳动枪的击锤并上膛或操作。

• 反复用拇指扳击锤以快速射击。